Re: [RE-wrenches] Water system with Grundfos SQFlex

[Bradley Bassett via RE-wrenches]

Jay,

Grid tie 240VAC
Tanks > 100ft to house with some switches on the float switch wiring >
500ft to pump house with control switches and one CU200 and AC power supply
> 20ft to one well with pump that is 260ft down > 300ft from pump house to
the other CU200 > 300ft to the second pump that is 25ft down. This is the
pump we prefer to use and that failed.  I'll have to think about control
methods. I could conceivably use a relay in the pump house and simply turn
an AC pump on and off. The control wirings for the two pumps would have to
be completely isolated from each other.

Any recommendations for an AC pump?  250ft head, 600ft of #12 wire at
240VAC, minimal flow needed. The SQF has ~2 gpm, which is plenty. 500gal
storage tank with gravity feed to the house.

Thanks,
Brad

On Mon, May 27, 2024 at 11:39 AM jay  wrote:

> HI Brad,
>
> Is this off/on grid?
> And are the two wells near each other or they just join up at the tank and
> float switch?
>
> If you’ve got the power then I’d install just a standard AC centrifugal
> pump.  Sure uses more power but lasts forever. And is maybe $500 vs $2500
> And you’ve said minimal water use.
>
> since you switch back and forth you could use a DPDT relay to use the
> reverse logic float which the CU200 requires.
>
>
>
> > On May 27, 2024, at 12:23 PM, Bradley Bassett via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
> >
> > OK, all of the fittings were just fine. After pulling the pump it was
> obvious that there was a total failure of the Grundfos SQFlex 3SQF-2 pump
> head, both the rotor and the check valve. Water just pours through it in
> reverse with no pressure. On the last test in place it would not produce
> more than 75psi running on 240VAC deadheaded. This pump is only 10 years
> old and only served a two person household with minimal water use on AC
> power, so it did not run anywhere near as many hours as a solar pump.
> 100psi head. I'd buy a different pump if I could come up with a method of
> control. Float switch is 1200 ft away (half AWG#16 and half AWG#14) and a
> second SQFlex pump in the other well so I'd have to figure out how to
> control both pumps. I do switch from one to the other; they do not run at
> the same time. Remember that these float switches are reverse, close on
> high water.
> >
> > Back when I sold these, the pump head was not available separate from
> the motor, anyone know if that is still true?
> > Anyone have a good source for these? I'll look of course, but first hand
> knowledge from anyone here is good.
> >
> > I do also have a backward leaky check valve in the pump house which will
> be a lot of work to replace. I have a problem with cheap unions leaking
> also, but they do come in handy in cases like this. I might just cut
> through one of the pipes and put in a union. Otherwise I have to
> disassemble a lot of plumbing.
> >
> > Living in the country...
> >
> > Thanks,
> > Brad Bassett
> >
>
>
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[jay via RE-wrenches]

HI Brad,

Is this off/on grid?
And are the two wells near each other or they just join up at the tank and 
float switch?

If you’ve got the power then I’d install just a standard AC centrifugal pump.  
Sure uses more power but lasts forever. And is maybe $500 vs $2500
And you’ve said minimal water use. 

since you switch back and forth you could use a DPDT relay to use the reverse 
logic float which the CU200 requires. 

 

> On May 27, 2024, at 12:23 PM, Bradley Bassett via RE-wrenches 
>  wrote:
> 
> OK, all of the fittings were just fine. After pulling the pump it was obvious 
> that there was a total failure of the Grundfos SQFlex 3SQF-2 pump head, both 
> the rotor and the check valve. Water just pours through it in reverse with no 
> pressure. On the last test in place it would not produce more than 75psi 
> running on 240VAC deadheaded. This pump is only 10 years old and only served 
> a two person household with minimal water use on AC power, so it did not run 
> anywhere near as many hours as a solar pump. 100psi head. I'd buy a different 
> pump if I could come up with a method of control. Float switch is 1200 ft 
> away (half AWG#16 and half AWG#14) and a second SQFlex pump in the other well 
> so I'd have to figure out how to control both pumps. I do switch from one to 
> the other; they do not run at the same time. Remember that these float 
> switches are reverse, close on high water.
> 
> Back when I sold these, the pump head was not available separate from the 
> motor, anyone know if that is still true?
> Anyone have a good source for these? I'll look of course, but first hand 
> knowledge from anyone here is good. 
> 
> I do also have a backward leaky check valve in the pump house which will be a 
> lot of work to replace. I have a problem with cheap unions leaking also, but 
> they do come in handy in cases like this. I might just cut through one of the 
> pipes and put in a union. Otherwise I have to disassemble a lot of plumbing. 
> 
> Living in the country...
> 
> Thanks,
> Brad Bassett
> 

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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Bradley Bassett via RE-wrenches]

OK, all of the fittings were just fine. After pulling the pump it was
obvious that there was a total failure of the Grundfos SQFlex 3SQF-2 pump
head, both the rotor and the check valve. Water just pours through it in
reverse with no pressure. On the last test in place it would not produce
more than 75psi running on 240VAC deadheaded. This pump is only 10 years
old and only served a two person household with minimal water use on AC
power, so it did not run anywhere near as many hours as a solar pump.
100psi head. I'd buy a different pump if I could come up with a method of
control. Float switch is 1200 ft away (half AWG#16 and half AWG#14) and a
second SQFlex pump in the other well so I'd have to figure out how to
control both pumps. I do switch from one to the other; they do not run at
the same time. Remember that these float switches are reverse, close on
high water.

Back when I sold these, the pump head was not available separate from the
motor, anyone know if that is still true?
Anyone have a good source for these? I'll look of course, but first hand
knowledge from anyone here is good.

I do also have a backward leaky check valve in the pump house which will be
a lot of work to replace. I have a problem with cheap unions leaking also,
but they do come in handy in cases like this. I might just cut through one
of the pipes and put in a union. Otherwise I have to disassemble a lot of
plumbing.

Living in the country...

Thanks,
Brad Bassett



On Mon, May 27, 2024 at 10:09 AM Ray Walters  wrote:

> Sorry Brad,
>
> It's been a long time since I did well work, and now, I can't find a
> supplier of the fittings.  The pics I sent earlier were just
> representative, but not exactly what I used in the past.  What I had used
> were bronze compression fittings similar to liquid tite conduit male
> adapters.  I have no idea who made them, or where I got them from. The
> closest I can find now are for poly gas line, and they're over $100/
> fitting at Grainger.
>
> [image: Main product photo] I use PEX and Shark bite fittings for any
> plumbing I'm doing now.  Never had a leak, super fast, and reversible.
>
> Ray
> On 5/26/2024 12:36 PM, Bradley Bassett wrote:
>
> Ray,
>
> Do you have a US supplier for either of these fittings? The Jentro fitting
> looks great, the Blueseal16 does not look like it would have much of a
> pressure rating. I did not find a specification.
>
> What do you all use for drop pipes for well pumps?  I have a 260ft deep
> well with galv, but the first batch corroded through, must have been a
> really bad batch. The second batch has been fine for many years. I can't
> bring myself to use PVC which is most common, I just have seen too many
> issues with it. Stainless is really expensive and hard to find threaded
> lengths, so I used very high pressure Poly. When it's rated for 300psi it
> has a very thick wall and is hard to get onto fittings, but is light weight
> and moderately flexible.
>
> Brad
>
> On Sun, May 26, 2024 at 11:17 AM Ray Walters via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>> Hi Brad;
>>
>> I've seen a lot of leaks with barb fittings on poly pipe. I just replace
>> most of the poly plumbing at my place, because I just couldn't get it to
>> stop leaking. Black poly pipe is the lowest cost per foot, but not quite
>> bomb proof.   Barb fittings are really more suited for irrigation under 40
>> psi, where leaks are just part of the irrigation system.  Also, if the pipe
>> is exposed to sunlight, it can degrade and split open. Your described setup
>> would have sections above 100 psi, and that will really drive leaks.  There
>> are compression fittings for the poly pipe, which are better.  Here are
>> some examples:
>>
>>
>> Barb fittings would probably be fine towards the top at the storage
>> tanks, where the pressure is much lower, but at the pump, and top of the
>> well, where the pressure is over 100 psi, I'd be using something better.
>>
>> Good Luck,
>>
>> Ray Walters
>>
>
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Ray Walters via RE-wrenches]

Sorry Brad,

It's been a long time since I did well work, and now, I can't find a 
supplier of the fittings.  The pics I sent earlier were just 
representative, but not exactly what I used in the past. What I had used 
were bronze compression fittings similar to liquid tite conduit male 
adapters.  I have no idea who made them, or where I got them from. The 
closest I can find now are for poly gas line, and they're over $100/ 
fitting at Grainger.


Main product photo I use PEX and Shark bite fittings for any plumbing 
I'm doing now.  Never had a leak, super fast, and reversible.


Ray

On 5/26/2024 12:36 PM, Bradley Bassett wrote:

Ray,

Do you have a US supplier for either of these fittings? The Jentro 
fitting looks great, the Blueseal16 does not look like it would have 
much of a pressure rating. I did not find a specification.


What do you all use for drop pipes for well pumps?  I have a 260ft 
deep well with galv, but the first batch corroded through, must have 
been a really bad batch. The second batch has been fine for many 
years. I can't bring myself to use PVC which is most common, I just 
have seen too many issues with it. Stainless is really expensive and 
hard to find threaded lengths, so I used very high pressure Poly. When 
it's rated for 300psi it has a very thick wall and is hard to get onto 
fittings, but is light weight and moderately flexible.


Brad

On Sun, May 26, 2024 at 11:17 AM Ray Walters via RE-wrenches 
 wrote:


Hi Brad;

I've seen a lot of leaks with barb fittings on poly pipe. I just
replace most of the poly plumbing at my place, because I just
couldn't get it to stop leaking. Black poly pipe is the lowest
cost per foot, but not quite bomb proof.   Barb fittings are
really more suited for irrigation under 40 psi, where leaks are
just part of the irrigation system.  Also, if the pipe is exposed
to sunlight, it can degrade and split open. Your described setup
would have sections above 100 psi, and that will really drive
leaks.  There are compression fittings for the poly pipe, which
are better.  Here are some examples:


Barb fittings would probably be fine towards the top at the
storage tanks, where the pressure is much lower, but at the pump,
and top of the well, where the pressure is over 100 psi, I'd be
using something better.

Good Luck,

Ray Walters
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Bradley Bassett via RE-wrenches]

Those are the exact inserts that I've used. Here's the clamps: clamps

I'm not too keen on buying from Amaz... so if you know of any other source
for these clamps let everyone know. I have installed two clamps per insert
and did rotate them as indicated. That just seemed like good practice at
the time. When installing the pipe onto these I used a camp stove and a pot
of boiling water. Stick the end of the pipe in the boiling water for a
little bit and they go on nicely. If it gets hard part way, I stick the
pipe end and insert both into the boiling water to finish the job.

I think I will not need any more inserts or clamps for this job, it looks
like the pitless adapter is the problem. I'll pull the pump tomorrow and
see if I can just replace the o-ring in it or if it needs something more.
Thanks for all the suggestions.
Brad



On Sun, May 26, 2024 at 2:31 PM jay  wrote:

> Hi Brad,
>
> Here is the  link.
>
>
> https://www.supplyhouse.com/Boshart-SSMAXL-100-1-Stainless-Steel-Male-Insert-Adapter-Extra-Long?utm_source=google_ad_medium=shopping_neutral_campaign=Shopping_Neutral_New_users_source=1=Cj0KCQjwu8uyBhC6ARIsAKwBGpQPie_fqna9Gi5uV3xJmRp-HuZVqG0d3rDUmMZSAikrkFZIrHRnqCQaAuZyEALw_wcB
>
> I’ve installed dozens of wells and dozens of hydros at high pressure using
> these.
> Multiple clamps per connector and I’ve had no leaks.
> Also while it doesn’t seem right, using teflon tape on the barbs actually
> helps to reduce leaks.
>
> Install the clamps at 120 or 180 degrees from each other is important.
>
> If you want to do it correctly then use a HDPE butt welding machine.  I
> just never could afford one.
>
> Jay
>
>
>
>
>
> On May 26, 2024, at 12:54 PM, Bradley Bassett via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
> Just went through all of Supplyhouse and did not find anything suitable.
> Off to do some looking down the well...
>
> On Sun, May 26, 2024 at 11:44 AM Dana Orzel via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>> Brad – Try supplyhouse.com
>>
>> 888.757.4774
>>
>>
>>
>> _
>>
>> Dana OrzelGREAT SOLAR WORKS!
>>
>> C – 208.721.7003  E – d...@solarwork.com
>>
>> W - www. greatsolarworks.com www.solarwork.com
>>
>> *“Responsible Technologies for Responsible People since 1988!”*
>>
>>
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Allan Sindelar via RE-wrenches]

Brad,For hand installation, especially with lower flow rates, my go-to solution, mentored to me by Windy Dankoff, was SDR9 high-pressure (140 psi max if I’m remembering correctly) flexible polyethylene pipe with bronze SDR9 compression couplers and connectors to MPT. They all used a stainless steel inner sleeve that fit inside the poly pipe. I carried the fittings in 3/4” and 1” sizes. Contact me off list if you’d like some of these fittings as I described. I’m retired and no longer need them. Allanal...@sindelarsolar.comOn May 26, 2024, at 12:39 PM, Bradley Bassett via RE-wrenches  wrote:Ray,Do you have a US supplier for either of these fittings? The Jentro fitting looks great, the Blueseal16 does not look like it would have much of a pressure rating. I did not find a specification.What do you all use for drop pipes for well pumps?  I have a 260ft deep well with galv, but the first batch corroded through, must have been a really bad batch. The second batch has been fine for many years. I can't bring myself to use PVC which is most common, I just have seen too many issues with it. Stainless is really expensive and hard to find threaded lengths, so I used very high pressure Poly. When it's rated for 300psi it has a very thick wall and is hard to get onto fittings, but is light weight and moderately flexible. BradOn Sun, May 26, 2024 at 11:17 AM Ray Walters via RE-wrenches  wrote:

  

  
  
Hi Brad;
I've seen a lot of leaks with barb fittings on poly pipe. I just
  replace most of the poly plumbing at my place, because I just
  couldn't get it to stop leaking. Black poly pipe is the lowest
  cost per foot, but not quite bomb proof.   Barb fittings are
  really more suited for irrigation under 40 psi, where leaks are
  just part of the irrigation system.  Also, if the pipe is exposed
  to sunlight, it can degrade and split open. Your described setup
  would have sections above 100 psi, and that will really drive
  leaks.  There are compression fittings for the poly pipe, which
  are better.  Here are some examples:


Barb fittings would probably be fine towards the top at the
  storage tanks, where the pressure is much lower, but at the pump,
  and top of the well, where the pressure is over 100 psi, I'd be
  using something better.
Good Luck,  

Ray Walters
  Remote Solar

On 5/26/2024 10:12 AM, Bradley Bassett
  via RE-wrenches wrote:


  
  Yes, lots of possibilities for leaks. I will be
exploring them today. Thanks for the tips for finding the
location. This setup uses 300psi 1" black poly pipe on a 25 ft
drop, and then about 1200 ft run of the same pipe up 220ft
elevation to the tanks up the hill with the house about 36ft
below the tanks with only gravity feed (16 psi). All connections
on the poly pipe are made with long stainless barb fittings with
T-bolt clamps, pretty bomb proof stuff. There is a pitless
adapter into the well casing, I will check that for sure under
pressure. I'll also fix the check valve in the pump house. I
seem to have a lot of issues with check valves, do they really
fail so often? We do not have high mineral water. I've
especially had issues with spring check valves and no longer use
them. The one in my pump house is a swing check valve
which I thought was pretty reliable. If I remember correctly,
the check valve in these pumps is not replaceable. Fortunately,
we actually have two wells, each with a 3SQF-2 pump that we can
alternate for supply.  I'll let you know what I find.

  
  
  Way back in the '90's we had a customer with a solar pump
that just would not perform. Even with a new pump, new
control, check this and that, it just would not pump much
water. It pumped fine when out of the well. The drop pipe
did not have any obstruction. They finally ran the pump
while it was out of the well with the drop pipe connected
and under pressure, and discovered a crack in the PVC pipe
that did not show up except under pressure. So leaks can
indeed be hard to find.
  
  
  Brad 




  

  
  
  
On Sun, May 26, 2024 at
  8:17 AM Jay via RE-wrenches 
  wrote:


  
Hi all


Yes the pump won’t go backwards but it’s
  possible there could be some leakage through the helical
  coil. 


But both check valves have to fail which is a
  low probability. 


 

Re: [RE-wrenches] Water system with Grundfos SQFlex

[Jay via RE-wrenches]

Hi JerryWhat equipment are you using to pull steel  from that depth?Jay On May 26, 2024, at 3:18 PM, Jerry Shafer via RE-wrenches  wrote:Hey wrenchesWater leaks in wells, I just pulled my well pump out at a mere 390 feet, older galvanized 11/4 « steel, where the Water rose and dropped the pipe was is poor shape, not leaking yet but it will l suggest if the pump is pul l Ed then replace it with well pipe either sch 80 or 120 depending on the depth. Fun timesOn Sun, May 26, 2024, 11:14 AM Darryl Thayer via RE-wrenches  wrote:I had a similar pipe leak. I forgot how I located it, but I used a vaccumn gauge or pump and to determine how far down the well the the leak was and pulled the pump and pipe and found a crack.On Sat, May 25, 2024 at 8:41 PM Bradley Bassett via RE-wrenches  wrote:I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm getting water flow in reverse either through the pump or a leak up to the pump. My question is if the check valve on the top of the pump is not sealing, will the progressive cavity pump allow water to flow through the pump in reverse? I'd think that with a positive displacement pump it would not, except very slowly or if it turned the motor backwards which I think would be very unlikely. There is about 100 psi head on  the pump. I think it's most likely I have a leak somewhere in the plumbing, and of course another failed check valve farther up in the plumbing. It's possible to get failures even with redundant protection if you have two concurrent failures, which I must have here. Brad Bassett Old time solar guy who used to do solar pumping back in the '80's and '90's. Mostly retired now.
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[jay via RE-wrenches]

And of course using a torch to soften the tubing just enough so that the barb 
fitting can insert and then grab into the plastic with the clamps.

For 1” its not needed but helpful.  For 1.25”- 2” its needed, or at least I’ve 
never been able to get a solid connection without heat.

Jay


> On May 26, 2024, at 3:31 PM, jay  wrote:
> 
> Hi Brad,
> 
> Here is the  link.
> 
> https://www.supplyhouse.com/Boshart-SSMAXL-100-1-Stainless-Steel-Male-Insert-Adapter-Extra-Long?utm_source=google_ad_medium=shopping_neutral_campaign=Shopping_Neutral_New_users_source=1=Cj0KCQjwu8uyBhC6ARIsAKwBGpQPie_fqna9Gi5uV3xJmRp-HuZVqG0d3rDUmMZSAikrkFZIrHRnqCQaAuZyEALw_wcB
>  
> 
> 
> I’ve installed dozens of wells and dozens of hydros at high pressure using 
> these.
> Multiple clamps per connector and I’ve had no leaks.
> Also while it doesn’t seem right, using teflon tape on the barbs actually 
> helps to reduce leaks.
> 
> Install the clamps at 120 or 180 degrees from each other is important.  
> 
> If you want to do it correctly then use a HDPE butt welding machine.  I just 
> never could afford one.
> 
> Jay
> 
> 
> 
> 
> 
>> On May 26, 2024, at 12:54 PM, Bradley Bassett via RE-wrenches 
>> > > wrote:
>> 
>> Just went through all of Supplyhouse and did not find anything suitable. Off 
>> to do some looking down the well...
>> 
>> On Sun, May 26, 2024 at 11:44 AM Dana Orzel via RE-wrenches 
>> > > wrote:
>> Brad – Try supplyhouse.com 
>> 888.757.4774
>> 
>>  
>> 
>> _
>> 
>> Dana OrzelGREAT SOLAR WORKS! 
>> 
>> C – 208.721.7003  E – d...@solarwork.com 
>> W - www. greatsolarworks.com  
>> www.solarwork.com 
>> “Responsible Technologies for Responsible People since 1988!”
>> 
>>  
>> 
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[jay via RE-wrenches]

Hi Brad,

Here is the  link.

https://www.supplyhouse.com/Boshart-SSMAXL-100-1-Stainless-Steel-Male-Insert-Adapter-Extra-Long?utm_source=google_ad_medium=shopping_neutral_campaign=Shopping_Neutral_New_users_source=1=Cj0KCQjwu8uyBhC6ARIsAKwBGpQPie_fqna9Gi5uV3xJmRp-HuZVqG0d3rDUmMZSAikrkFZIrHRnqCQaAuZyEALw_wcB
 


I’ve installed dozens of wells and dozens of hydros at high pressure using 
these.
Multiple clamps per connector and I’ve had no leaks.
Also while it doesn’t seem right, using teflon tape on the barbs actually helps 
to reduce leaks.

Install the clamps at 120 or 180 degrees from each other is important.  

If you want to do it correctly then use a HDPE butt welding machine.  I just 
never could afford one.

Jay





> On May 26, 2024, at 12:54 PM, Bradley Bassett via RE-wrenches 
>  wrote:
> 
> Just went through all of Supplyhouse and did not find anything suitable. Off 
> to do some looking down the well...
> 
> On Sun, May 26, 2024 at 11:44 AM Dana Orzel via RE-wrenches 
>  > wrote:
> Brad – Try supplyhouse.com 
> 888.757.4774
> 
>  
> 
> _
> 
> Dana OrzelGREAT SOLAR WORKS! 
> 
> C – 208.721.7003  E – d...@solarwork.com 
> W - www. greatsolarworks.com  
> www.solarwork.com 
> “Responsible Technologies for Responsible People since 1988!”
> 
>  
> 
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Jerry Shafer via RE-wrenches]

Hey wrenches
Water leaks in wells, I just pulled my well pump out at a mere 390 feet,
older galvanized 11/4 « steel, where the Water rose and dropped the pipe
was is poor shape, not leaking yet but it will l suggest if the pump is pul
l Ed then replace it with well pipe either sch 80 or 120 depending on the
depth.
Fun times

On Sun, May 26, 2024, 11:14 AM Darryl Thayer via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> I had a similar pipe leak. I forgot how I located it, but I used a vaccumn
> gauge or pump and to determine how far down the well the the leak was
> and pulled the pump and pipe and found a crack.
>
> On Sat, May 25, 2024 at 8:41 PM Bradley Bassett via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>> I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm getting
>> water flow in reverse either through the pump or a leak up to the pump. My
>> question is if the check valve on the top of the pump is not sealing, will
>> the progressive cavity pump allow water to flow through the pump in
>> reverse? I'd think that with a positive displacement pump it would not,
>> except very slowly or if it turned the motor backwards which I think would
>> be very unlikely. There is about 100 psi head on  the pump.
>>
>> I think it's most likely I have a leak somewhere in the plumbing, and of
>> course another failed check valve farther up in the plumbing. It's possible
>> to get failures even with redundant protection if you have two concurrent
>> failures, which I must have here.
>>
>> Brad Bassett
>> Old time solar guy who used to do solar pumping back in the '80's and
>> '90's. Mostly retired now.
>>
>>
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[MDElectricSolar via RE-wrenches]

Poly or pvc is very common here in Northern California, and I have seen threaded schedule 80 PVC which takes longer to drop or pull but is a pretty nice solution.Michael D NelsonMD Electric & Solar, Inc.707-684-0064 mobile707-884-1862 officewww.mdelectricsolar.comwww.facebook.com/mdelectricandsolarOn May 26, 2024, at 11:58 AM, Bradley Bassett via RE-wrenches  wrote:Just went through all of Supplyhouse and did not find anything suitable. Off to do some looking down the well...On Sun, May 26, 2024 at 11:44 AM Dana Orzel via RE-wrenches  wrote:







Brad – Try supplyhouse.com
888.757.4774
 
_
Dana Orzel   
GREAT SOLAR WORKS! 

C – 208.721.7003  E –
d...@solarwork.com
W - www. greatsolarworks.com
www.solarwork.com
“Responsible Technologies for Responsible People since 1988!”
 



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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Bradley Bassett via RE-wrenches]

Just went through all of Supplyhouse and did not find anything suitable.
Off to do some looking down the well...

On Sun, May 26, 2024 at 11:44 AM Dana Orzel via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Brad – Try supplyhouse.com
>
> 888.757.4774
>
>
>
> _
>
> Dana OrzelGREAT SOLAR WORKS!
>
> C – 208.721.7003  E – d...@solarwork.com
>
> W - www. greatsolarworks.com www.solarwork.com
>
> *“Responsible Technologies for Responsible People since 1988!”*
>
>
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Dana Orzel via RE-wrenches]

Brad - Try supplyhouse.com
888.757.4774

_
Dana OrzelGREAT SOLAR WORKS!
C - 208.721.7003  E - d...@solarwork.com
W - www. greatsolarworks.com www.solarwork.com
"Responsible Technologies for Responsible People since 1988!"

--- Begin Message ---
Ray,

Do you have a US supplier for either of these fittings? The Jentro fitting 
looks great, the Blueseal16 does not look like it would have much of a pressure 
rating. I did not find a specification.

What do you all use for drop pipes for well pumps?  I have a 260ft deep well 
with galv, but the first batch corroded through, must have been a really bad 
batch. The second batch has been fine for many years. I can't bring myself to 
use PVC which is most common, I just have seen too many issues with it. 
Stainless is really expensive and hard to find threaded lengths, so I used very 
high pressure Poly. When it's rated for 300psi it has a very thick wall and is 
hard to get onto fittings, but is light weight and moderately flexible.

Brad

On Sun, May 26, 2024 at 11:17 AM Ray Walters via RE-wrenches 
mailto:re-wrenches@lists.re-wrenches.org>> 
wrote:

Hi Brad;

I've seen a lot of leaks with barb fittings on poly pipe. I just replace most 
of the poly plumbing at my place, because I just couldn't get it to stop 
leaking. Black poly pipe is the lowest cost per foot, but not quite bomb proof. 
  Barb fittings are really more suited for irrigation under 40 psi, where leaks 
are just part of the irrigation system.  Also, if the pipe is exposed to 
sunlight, it can degrade and split open. Your described setup would have 
sections above 100 psi, and that will really drive leaks.  There are 
compression fittings for the poly pipe, which are better.  Here are some 
examples:

[PE pipe compression fitting for drinking water? Choose Blueseal16 - SAB 
spa][Jentro Fittings sdr11 klem draadstuk]

Barb fittings would probably be fine towards the top at the storage tanks, 
where the pressure is much lower, but at the pump, and top of the well, where 
the pressure is over 100 psi, I'd be using something better.

Good Luck,

Ray Walters
Remote Solar

On 5/26/2024 10:12 AM, Bradley Bassett via RE-wrenches wrote:
Yes, lots of possibilities for leaks. I will be exploring them today. Thanks 
for the tips for finding the location. This setup uses 300psi 1" black poly 
pipe on a 25 ft drop, and then about 1200 ft run of the same pipe up 220ft 
elevation to the tanks up the hill with the house about 36ft below the tanks 
with only gravity feed (16 psi). All connections on the poly pipe are made with 
long stainless barb fittings with T-bolt clamps, pretty bomb proof stuff. There 
is a pitless adapter into the well casing, I will check that for sure under 
pressure. I'll also fix the check valve in the pump house. I seem to have a lot 
of issues with check valves, do they really fail so often? We do not have high 
mineral water. I've especially had issues with spring check valves and no 
longer use them. The one in my pump house is a swing check valve which I 
thought was pretty reliable. If I remember correctly, the check valve in these 
pumps is not replaceable. Fortunately, we actually have two wells, each with a 
3SQF-2 pump that we can alternate for supply.  I'll let you know what I find.

Way back in the '90's we had a customer with a solar pump that just would not 
perform. Even with a new pump, new control, check this and that, it just would 
not pump much water. It pumped fine when out of the well. The drop pipe did not 
have any obstruction. They finally ran the pump while it was out of the well 
with the drop pipe connected and under pressure, and discovered a crack in the 
PVC pipe that did not show up except under pressure. So leaks can indeed be 
hard to find.

Brad



On Sun, May 26, 2024 at 8:17 AM Jay via RE-wrenches 
mailto:re-wrenches@lists.re-wrenches.org>> 
wrote:
Hi all

Yes the pump won’t go backwards but it’s possible there could be some leakage 
through the helical coil.

But both check valves have to fail which is a low probability.

I’ve seen pipe broken due to someone closing a valve and not having a pressure 
relief valve. Not knowing what kind of pipe/fittings  are being used it could 
be corrosion has made a hole.

Not knowing the layout it might be possible to split the plumbing and see if 
the leakage is above or in the well.

Lots of fun possibilities

Jay


On May 26, 2024, at 9:03 AM, Roy Butler via RE-wrenches 
mailto:re-wrenches@lists.re-wrenches.org>> 
wrote:

 Brad,

Windy might chime in at some point to back me up on this but I see no way for 
that pump to turn backwards.
Reverse flow is likely a leak at the pump, the down well piping or at the 
pitless adapter if there is one.

Roy

Another old time solar and wind guy, hoping to be retired someday :-).

Roy Butler
Four Winds Renewable Energy, LLC
8902 Route 46, 

Re: [RE-wrenches] Water system with Grundfos SQFlex

[Bradley Bassett via RE-wrenches]

Ray,

Do you have a US supplier for either of these fittings? The Jentro fitting
looks great, the Blueseal16 does not look like it would have much of a
pressure rating. I did not find a specification.

What do you all use for drop pipes for well pumps?  I have a 260ft deep
well with galv, but the first batch corroded through, must have been a
really bad batch. The second batch has been fine for many years. I can't
bring myself to use PVC which is most common, I just have seen too many
issues with it. Stainless is really expensive and hard to find threaded
lengths, so I used very high pressure Poly. When it's rated for 300psi it
has a very thick wall and is hard to get onto fittings, but is light weight
and moderately flexible.

Brad

On Sun, May 26, 2024 at 11:17 AM Ray Walters via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Hi Brad;
>
> I've seen a lot of leaks with barb fittings on poly pipe. I just replace
> most of the poly plumbing at my place, because I just couldn't get it to
> stop leaking. Black poly pipe is the lowest cost per foot, but not quite
> bomb proof.   Barb fittings are really more suited for irrigation under 40
> psi, where leaks are just part of the irrigation system.  Also, if the pipe
> is exposed to sunlight, it can degrade and split open. Your described setup
> would have sections above 100 psi, and that will really drive leaks.  There
> are compression fittings for the poly pipe, which are better.  Here are
> some examples:
>
> [image: PE pipe compression fitting for drinking water? Choose Blueseal16
> - SAB spa][image: Jentro Fittings sdr11 klem draadstuk]
>
> Barb fittings would probably be fine towards the top at the storage tanks,
> where the pressure is much lower, but at the pump, and top of the well,
> where the pressure is over 100 psi, I'd be using something better.
>
> Good Luck,
>
> Ray Walters
> Remote Solar
> On 5/26/2024 10:12 AM, Bradley Bassett via RE-wrenches wrote:
>
> Yes, lots of possibilities for leaks. I will be exploring them today.
> Thanks for the tips for finding the location. This setup uses 300psi 1"
> black poly pipe on a 25 ft drop, and then about 1200 ft run of the same
> pipe up 220ft elevation to the tanks up the hill with the house about 36ft
> below the tanks with only gravity feed (16 psi). All connections on the
> poly pipe are made with long stainless barb fittings with T-bolt clamps,
> pretty bomb proof stuff. There is a pitless adapter into the well casing, I
> will check that for sure under pressure. I'll also fix the check valve in
> the pump house. I seem to have a lot of issues with check valves, do they
> really fail so often? We do* not* have high mineral water. I've
> especially had issues with spring check valves and no longer use them. The
> one in my pump house is a swing check valve which I thought was pretty
> reliable. If I remember correctly, the check valve in these pumps is not
> replaceable. Fortunately, we actually have two wells, each with a
> 3SQF-2 pump that we can alternate for supply.  I'll let you know what I
> find.
>
> Way back in the '90's we had a customer with a solar pump that just would
> not perform. Even with a new pump, new control, check this and that, it
> just would not pump much water. It pumped fine when out of the well. The
> drop pipe did not have any obstruction. They finally ran the pump while it
> was out of the well with the drop pipe connected and under pressure, and
> discovered a crack in the PVC pipe that did not show up except under
> pressure. So leaks can indeed be hard to find.
>
> Brad
>
>
>
> On Sun, May 26, 2024 at 8:17 AM Jay via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>> Hi all
>>
>> Yes the pump won’t go backwards but it’s possible there could be some
>> leakage through the helical coil.
>>
>> But both check valves have to fail which is a low probability.
>>
>> I’ve seen pipe broken due to someone closing a valve and not having a
>> pressure relief valve. Not knowing what kind of pipe/fittings  are being
>> used it could be corrosion has made a hole.
>>
>> Not knowing the layout it might be possible to split the plumbing and see
>> if the leakage is above or in the well.
>>
>> Lots of fun possibilities
>>
>> Jay
>>
>>
>> On May 26, 2024, at 9:03 AM, Roy Butler via RE-wrenches <
>> re-wrenches@lists.re-wrenches.org> wrote:
>>
>>  Brad,
>>
>> Windy might chime in at some point to back me up on this but I see no way
>> for that pump to turn backwards.
>> Reverse flow is likely a leak at the pump, the down well piping or at the
>> pitless adapter if there is one.
>>
>> Roy
>>
>> Another old time solar and wind guy, hoping to be retired someday :-).
>>
>> Roy Butler
>> Four Winds Renewable Energy, LLC
>> 8902 Route 46, Arkport, NY 14807
>>
>>
>> Education is when you read the fine print; experience is what you get when 
>> you don’t.
>>
>> “The less people know, the more stubbornly they know it.”
>>
>> Although no trees were killed in the sending 

Re: [RE-wrenches] Water system with Grundfos SQFlex

[Ray Walters via RE-wrenches]

Hi Brad;

I've seen a lot of leaks with barb fittings on poly pipe. I just replace 
most of the poly plumbing at my place, because I just couldn't get it to 
stop leaking. Black poly pipe is the lowest cost per foot, but not quite 
bomb proof.   Barb fittings are really more suited for irrigation under 
40 psi, where leaks are just part of the irrigation system.  Also, if 
the pipe is exposed to sunlight, it can degrade and split open. Your 
described setup would have sections above 100 psi, and that will really 
drive leaks.  There are compression fittings for the poly pipe, which 
are better.  Here are some examples:


PE pipe compression fitting for drinking water? Choose Blueseal16 - SAB 
spaJentro Fittings sdr11 klem draadstuk


Barb fittings would probably be fine towards the top at the storage 
tanks, where the pressure is much lower, but at the pump, and top of the 
well, where the pressure is over 100 psi, I'd be using something better.


Good Luck,

Ray Walters
Remote Solar

On 5/26/2024 10:12 AM, Bradley Bassett via RE-wrenches wrote:
Yes, lots of possibilities for leaks. I will be exploring them today. 
Thanks for the tips for finding the location. This setup uses 300psi 
1" black poly pipe on a 25 ft drop, and then about 1200 ft run of the 
same pipe up 220ft elevation to the tanks up the hill with the house 
about 36ft below the tanks with only gravity feed (16 psi). All 
connections on the poly pipe are made with long stainless barb 
fittings with T-bolt clamps, pretty bomb proof stuff. There is a 
pitless adapter into the well casing, I will check that for sure under 
pressure. I'll also fix the check valve in the pump house. I seem to 
have a lot of issues with check valves, do they really fail so often? 
We do_not_ have high mineral water. I've especially had issues with 
spring check valves and no longer use them. The one in my pump house 
is a swing check valve which I thought was pretty reliable. If I 
remember correctly, the check valve in these pumps is not replaceable. 
Fortunately, we actually have two wells, each with a 3SQF-2 pump that 
we can alternate for supply.  I'll let you know what I find.


Way back in the '90's we had a customer with a solar pump that just 
would not perform. Even with a new pump, new control, check this and 
that, it just would not pump much water. It pumped fine when out of 
the well. The drop pipe did not have any obstruction. They finally ran 
the pump while it was out of the well with the drop pipe connected and 
under pressure, and discovered a crack in the PVC pipe that did not 
show up except under pressure. So leaks can indeed be hard to find.


Brad



On Sun, May 26, 2024 at 8:17 AM Jay via RE-wrenches 
 wrote:


Hi all

Yes the pump won’t go backwards but it’s possible there could be
some leakage through the helical coil.

But both check valves have to fail which is a low probability.

I’ve seen pipe broken due to someone closing a valve and not
having a pressure relief valve. Not knowing what kind of
pipe/fittings  are being used it could be corrosion has made a hole.

Not knowing the layout it might be possible to split the plumbing
and see if the leakage is above or in the well.

Lots of fun possibilities

Jay



On May 26, 2024, at 9:03 AM, Roy Butler via RE-wrenches
 wrote:

 Brad,

Windy might chime in at some point to back me up on this but I
see no way for that pump to turn backwards.
Reverse flow is likely a leak at the pump, the down well piping
or at the pitless adapter if there is one.

Roy

Another old time solar and wind guy, hoping to be retired someday
:-).
Roy Butler
Four Winds Renewable Energy, LLC
8902 Route 46, Arkport, NY 14807


Education is when you read the fine print; experience is what you get when 
you don’t.

“The less people know, the more stubbornly they know it.”

Although no trees were killed in the sending of this message,
a large number of electrons were terribly inconvenienced.

 
On 5/26/2024 10:10 AM, Dave Angelini Offgrid Solar via

RE-wrenches wrote:

Hey Brad,
Sometimes shooting is best if you tell more on what you have
done so far like using the SQF shooting guide, especially on a
holiday weekend
Assume there is a CU200 controller and pump is in ground still,
must be with 100ft head, sorry
No high amps? It runs, How old?
--Dave

  
*Dave Angelini Offgrid Solar "we go where powerlines don't"

https://offgridsolar1.com/

e-mail offgridso...@sti.net text 209 813 0060*


On 2024-05-26 4:26 am, Jay via RE-wrenches wrote:


Hi Brad

With 2 check valves leaking I’d look for a broken pipe or a
corroded fitting.

If there is anyway to isolate between the 2 check valves then
you could 

Re: [RE-wrenches] Water system with Grundfos SQFlex

[Darryl Thayer via RE-wrenches]

I had a similar pipe leak. I forgot how I located it, but I used a vaccumn
gauge or pump and to determine how far down the well the the leak was
and pulled the pump and pipe and found a crack.

On Sat, May 25, 2024 at 8:41 PM Bradley Bassett via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm getting
> water flow in reverse either through the pump or a leak up to the pump. My
> question is if the check valve on the top of the pump is not sealing, will
> the progressive cavity pump allow water to flow through the pump in
> reverse? I'd think that with a positive displacement pump it would not,
> except very slowly or if it turned the motor backwards which I think would
> be very unlikely. There is about 100 psi head on  the pump.
>
> I think it's most likely I have a leak somewhere in the plumbing, and of
> course another failed check valve farther up in the plumbing. It's possible
> to get failures even with redundant protection if you have two concurrent
> failures, which I must have here.
>
> Brad Bassett
> Old time solar guy who used to do solar pumping back in the '80's and
> '90's. Mostly retired now.
>
>
> ___
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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Bradley Bassett via RE-wrenches]

Yes, lots of possibilities for leaks. I will be exploring them today.
Thanks for the tips for finding the location. This setup uses 300psi 1"
black poly pipe on a 25 ft drop, and then about 1200 ft run of the same
pipe up 220ft elevation to the tanks up the hill with the house about 36ft
below the tanks with only gravity feed (16 psi). All connections on the
poly pipe are made with long stainless barb fittings with T-bolt clamps,
pretty bomb proof stuff. There is a pitless adapter into the well casing, I
will check that for sure under pressure. I'll also fix the check valve in
the pump house. I seem to have a lot of issues with check valves, do they
really fail so often? We do* not* have high mineral water. I've especially
had issues with spring check valves and no longer use them. The one in my
pump house is a swing check valve which I thought was pretty reliable. If I
remember correctly, the check valve in these pumps is not replaceable.
Fortunately, we actually have two wells, each with a 3SQF-2 pump that we
can alternate for supply.  I'll let you know what I find.

Way back in the '90's we had a customer with a solar pump that just would
not perform. Even with a new pump, new control, check this and that, it
just would not pump much water. It pumped fine when out of the well. The
drop pipe did not have any obstruction. They finally ran the pump while it
was out of the well with the drop pipe connected and under pressure, and
discovered a crack in the PVC pipe that did not show up except under
pressure. So leaks can indeed be hard to find.

Brad



On Sun, May 26, 2024 at 8:17 AM Jay via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Hi all
>
> Yes the pump won’t go backwards but it’s possible there could be some
> leakage through the helical coil.
>
> But both check valves have to fail which is a low probability.
>
> I’ve seen pipe broken due to someone closing a valve and not having a
> pressure relief valve. Not knowing what kind of pipe/fittings  are being
> used it could be corrosion has made a hole.
>
> Not knowing the layout it might be possible to split the plumbing and see
> if the leakage is above or in the well.
>
> Lots of fun possibilities
>
> Jay
>
>
> On May 26, 2024, at 9:03 AM, Roy Butler via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>  Brad,
>
> Windy might chime in at some point to back me up on this but I see no way
> for that pump to turn backwards.
> Reverse flow is likely a leak at the pump, the down well piping or at the
> pitless adapter if there is one.
>
> Roy
>
> Another old time solar and wind guy, hoping to be retired someday :-).
>
> Roy Butler
> Four Winds Renewable Energy, LLC
> 8902 Route 46, Arkport, NY 14807
>
>
> Education is when you read the fine print; experience is what you get when 
> you don’t.
>
> “The less people know, the more stubbornly they know it.”
>
> Although no trees were killed in the sending of this message,
> a large number of electrons were terribly inconvenienced.
>
>
>
> On 5/26/2024 10:10 AM, Dave Angelini Offgrid Solar via RE-wrenches wrote:
>
> Hey Brad,
>
> Sometimes shooting is best if you tell more on what you have done so far
> like using the SQF shooting guide, especially on a holiday weekend
> Assume there is a CU200 controller and pump is in ground still, must be
> with 100ft head, sorry
> No high amps? It runs, How old?
>
> --Dave
>
>
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
>https://offgridsolar1.com/ 
>   
> e-mail  offgridso...@sti.net 
> text 209 813 0060*
>
>
> On 2024-05-26 4:26 am, Jay via RE-wrenches wrote:
>
> Hi Brad
>
> With 2 check valves leaking I’d look for a broken pipe or a corroded
> fitting.
>
> If there is anyway to isolate between the 2 check valves then you could
> measure the pressure drop on both sides which should point to the direction
> of the leak.
>
> Jay
>
> On May 25, 2024, at 7:41 PM, Bradley Bassett via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>
> I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm getting
> water flow in reverse either through the pump or a leak up to the pump. My
> question is if the check valve on the top of the pump is not sealing, will
> the progressive cavity pump allow water to flow through the pump in
> reverse? I'd think that with a positive displacement pump it would not,
> except very slowly or if it turned the motor backwards which I think would
> be very unlikely. There is about 100 psi head on  the pump.
>
> I think it's most likely I have a leak somewhere in the plumbing, and of
> course another failed check valve farther up in the plumbing. It's possible
> to get failures even with redundant protection if you have two concurrent
> failures, which I must have here.
>
> Brad Bassett
> Old time solar guy who used to do solar pumping back in the '80's and
> '90's. Mostly retired 

Re: [RE-wrenches] Water system with Grundfos SQFlex

[Jay via RE-wrenches]

Hi allYes the pump won’t go backwards but it’s possible there could be some leakage through the helical coil. But both check valves have to fail which is a low probability. I’ve seen pipe broken due to someone closing a valve and not having a pressure relief valve. Not knowing what kind of pipe/fittings  are being used it could be corrosion has made a hole. Not knowing the layout it might be possible to split the plumbing and see if the leakage is above or in the well. Lots of fun possibilities JayOn May 26, 2024, at 9:03 AM, Roy Butler via RE-wrenches  wrote:

  

  
  
Brad,
  
  Windy might chime in at some point to back me up on this but I see
  no way for that pump to turn backwards.
  Reverse flow is likely a leak at the pump, the down well piping or
  at the pitless adapter if there is one.
  
  Roy
  
  Another old time solar and wind guy, hoping to be retired someday
  :-).

Roy Butler
Four Winds Renewable Energy, LLC
8902 Route 46, Arkport, NY 14807


Education is when you read the fine print; experience is what you get when you don’t.

“The less people know, the more stubbornly they know it.”

Although no trees were killed in the sending of this message, 
a large number of electrons were terribly inconvenienced.



On 5/26/2024 10:10 AM, Dave Angelini
  Offgrid Solar via RE-wrenches wrote:


  
  Hey Brad,
   
  Sometimes shooting is best if you tell more on what you have
done so far like using the SQF shooting guide, especially on a
holiday weekend
  Assume there is a CU200 controller and pump is in ground
still, must be with 100ft head, sorry
  No high amps? It runs, How old?  
   
  --Dave
  
 
Dave Angelini Offgrid Solar
"we go where powerlines don't"
  https://offgridsolar1.com/ 
e-mail  offgridso...@sti.net
text 209 813 0060
  
  
  
  On 2024-05-26 4:26 am, Jay via RE-wrenches
wrote:
  
Hi Brad
  
  With 2 check valves leaking I’d look for a broken pipe or a
  corroded fitting. 
  
  If there is anyway to isolate between the 2 check valves then
  you could measure the pressure drop on both sides which should
  point to the direction of the leak. 
  
  Jay
  
  On
May 25, 2024, at 7:41 PM, Bradley Bassett via RE-wrenches

wrote:


I have a water system with a Grundfos SQFlex SQF3-2 pump.
I'm getting water flow in reverse either through the pump or
a leak up to the pump. My question is if the check valve on
the top of the pump is not sealing, will the progressive
cavity pump allow water to flow through the pump in reverse?
I'd think that with a positive displacement pump it would
not, except very slowly or if it turned the motor backwards
which I think would be very unlikely. There is about 100 psi
head on  the pump. 

I think it's most likely I have a leak somewhere in the
plumbing, and of course another failed check valve farther
up in the plumbing. It's possible to get failures even with
redundant protection if you have two concurrent failures,
which I must have here. 

Brad Bassett 
Old time solar guy who used to do solar pumping back in the
'80's and '90's. Mostly retired now.


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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Roy Butler via RE-wrenches]

Brad,

Windy might chime in at some point to back me up on this but I see no 
way for that pump to turn backwards.
Reverse flow is likely a leak at the pump, the down well piping or at 
the pitless adapter if there is one.


Roy

Another old time solar and wind guy, hoping to be retired someday :-).

Roy Butler
Four Winds Renewable Energy, LLC
8902 Route 46, Arkport, NY 14807


Education is when you read the fine print; experience is what you get when you 
don’t.

“The less people know, the more stubbornly they know it.”

Although no trees were killed in the sending of this message,
a large number of electrons were terribly inconvenienced.




On 5/26/2024 10:10 AM, Dave Angelini Offgrid Solar via RE-wrenches wrote:

Hey Brad,
Sometimes shooting is best if you tell more on what you have done so 
far like using the SQF shooting guide, especially on a holiday weekend
Assume there is a CU200 controller and pump is in ground still, must 
be with 100ft head, sorry

No high amps? It runs, How old?
--Dave

  
*Dave Angelini Offgrid Solar "we go where powerlines don't" 
https://offgridsolar1.com/ 
 
e-mail offgridso...@sti.net text 209 813 0060*



On 2024-05-26 4:26 am, Jay via RE-wrenches wrote:


Hi Brad

With 2 check valves leaking I’d look for a broken pipe or a corroded 
fitting.


If there is anyway to isolate between the 2 check valves then you 
could measure the pressure drop on both sides which should point to 
the direction of the leak.


Jay

On May 25, 2024, at 7:41 PM, Bradley Bassett via RE-wrenches 
 wrote:



I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm 
getting water flow in reverse either through the pump or a leak up 
to the pump. My question is if the check valve on the top of the 
pump is not sealing, will the progressive cavity pump allow water to 
flow through the pump in reverse? I'd think that with a positive 
displacement pump it would not, except very slowly or if it turned 
the motor backwards which I think would be very unlikely. There is 
about 100 psi head on  the pump.


I think it's most likely I have a leak somewhere in the plumbing, 
and of course another failed check valve farther up in the plumbing. 
It's possible to get failures even with redundant protection if you 
have two concurrent failures, which I must have here.


Brad Bassett
Old time solar guy who used to do solar pumping back in the '80's 
and '90's. Mostly retired now.



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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Dave Angelini Offgrid Solar via RE-wrenches]

Hey Brad,

Sometimes shooting is best if you tell more on what you have done so far 
like using the SQF shooting guide, especially on a holiday weekend
Assume there is a CU200 controller and pump is in ground still, must be 
with 100ft head, sorry

No high amps? It runs, How old?

--Dave

Dave Angelini Offgrid Solar
"we go where powerlines don't"
   [1]https://offgridsolar1.com/ [2]  [1]
e-mail  offgridso...@sti.net
text 209 813 0060

On 2024-05-26 4:26 am, Jay via RE-wrenches wrote:


Hi Brad

With 2 check valves leaking I'd look for a broken pipe or a corroded 
fitting.


If there is anyway to isolate between the 2 check valves then you could 
measure the pressure drop on both sides which should point to the 
direction of the leak.


Jay

On May 25, 2024, at 7:41 PM, Bradley Bassett via RE-wrenches 
 wrote:


I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm getting 
water flow in reverse either through the pump or a leak up to the 
pump. My question is if the check valve on the top of the pump is not 
sealing, will the progressive cavity pump allow water to flow through 
the pump in reverse? I'd think that with a positive displacement pump 
it would not, except very slowly or if it turned the motor backwards 
which I think would be very unlikely. There is about 100 psi head on  
the pump.


I think it's most likely I have a leak somewhere in the plumbing, and 
of course another failed check valve farther up in the plumbing. It's 
possible to get failures even with redundant protection if you have 
two concurrent failures, which I must have here.


Brad Bassett
Old time solar guy who used to do solar pumping back in the '80's and 
'90's. Mostly retired now.


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Re: [RE-wrenches] Water system with Grundfos SQFlex

[Jay via RE-wrenches]

Hi Brad

With 2 check valves leaking I’d look for a broken pipe or a corroded fitting. 

If there is anyway to isolate between the 2 check valves then you could measure 
the pressure drop on both sides which should point to the direction of the 
leak. 

Jay

> On May 25, 2024, at 7:41 PM, Bradley Bassett via RE-wrenches 
>  wrote:
> 
> 
> I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm getting water 
> flow in reverse either through the pump or a leak up to the pump. My question 
> is if the check valve on the top of the pump is not sealing, will the 
> progressive cavity pump allow water to flow through the pump in reverse? I'd 
> think that with a positive displacement pump it would not, except very slowly 
> or if it turned the motor backwards which I think would be very unlikely. 
> There is about 100 psi head on  the pump. 
> 
> I think it's most likely I have a leak somewhere in the plumbing, and of 
> course another failed check valve farther up in the plumbing. It's possible 
> to get failures even with redundant protection if you have two concurrent 
> failures, which I must have here. 
> 
> Brad Bassett 
> Old time solar guy who used to do solar pumping back in the '80's and '90's. 
> Mostly retired now.
> 
> 
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[RE-wrenches] Water system with Grundfos SQFlex

[Bradley Bassett via RE-wrenches]

I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm getting water
flow in reverse either through the pump or a leak up to the pump. My
question is if the check valve on the top of the pump is not sealing, will
the progressive cavity pump allow water to flow through the pump in
reverse? I'd think that with a positive displacement pump it would not,
except very slowly or if it turned the motor backwards which I think would
be very unlikely. There is about 100 psi head on  the pump.

I think it's most likely I have a leak somewhere in the plumbing, and of
course another failed check valve farther up in the plumbing. It's possible
to get failures even with redundant protection if you have two concurrent
failures, which I must have here.

Brad Bassett
Old time solar guy who used to do solar pumping back in the '80's and
'90's. Mostly retired now.
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