six -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gregg Key Sent: Friday, May 30, 2008 8:37 AM To: [email protected] Subject: Re: 200 psi test for components rated 175
Speaking of such test, How many systems are installed with a means to test the backflow at the required forward flow rate? like a wall hydrant? Thom McMahon wrote: > Don't forget the derided full forward flow test! > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Steve > Leyton > Sent: Friday, May 30, 2008 8:42 AM > To: [email protected] > Subject: RE: Re[2]: 200 psi test for components rated 175 > > So it's contractual, not philosophical. Presumably, the installing > contractor tests it ... > > I don't think we're talking about testing the backflow appliances > itself for functionality - that's best left for the "certified backflow > technician." If you pump up an UG including the BFP, the relief valve > will only operate when there's a differential between the clappers. > So an RPZ or RPDA usually weeps a bit when you pump it up, but once > the line is equalized you can run a conventional hydro. And if you > just want to test against it, you can pump up through the FDC or main > drain or the supply-side tap on the riser check, if so equipped. > > Steve Leyton > Protection Design & Consulting > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Coastal > Sent: Thursday, May 29, 2008 7:10 PM > To: Steve Leyton > Subject: Re[2]: 200 psi test for components rated 175 > > Hello Steve, > > I start 1' AFF with my work. I sub out any underground installation > work I get (which I try to avoid) and it is up to them to test it. > Only question I have is how do you get an RPZ to hold the back > pressure to hydro to it? Pump the system up through the #1 test cock? > > -- > Best regards, > Charles Thurston > Coastal mailto:[EMAIL PROTECTED] > > Thursday, May 29, 2008, 6:55:37 PM, you wrote: > >> I'll bite - why not? If the Fire Department pumps into the FDC, > isn't >> it likely to back pressure the BFP to at least 150? And if so, > wouldn't >> it be prudent to test the assembly? > >> Steve Leyton >> Protection Design & Consulting > > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of >> Charles Thurston >> Sent: Thursday, May 29, 2008 3:30 PM >> To: IPA >> Subject: Re: 200 psi test for components rated 175 > >> Hello IPA, > >> I for one have never put 200 on the backflow, I will not either. > >> Thursday, May 29, 2008, 6:03:25 PM, you wrote: > >>> I've got this question posed to me: > >>> Backflow preventor is rated at 175 (as are most of the fire >>> sprinkler >>> components) yet we are required to do a 200 psi test. Is the keyword >> here >>> "working pressure" of 175 psi or am I missing something? > >>> thx, >>> _______________________________________________ >>> Sprinklerforum mailing list >>> [email protected] >>> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > >>> To Unsubscribe, send an email >> to:[EMAIL PROTECTED] >>> (Put the word unsubscribe in the subject field) > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
