Because what is being said is that an additional backflow may be required on the sprinkler side of the dom. tap to prevent cross-contamination of the dom. System from the sprinklers. But the question is how is the existing domestic supply protected from the existing sprinkler system now?
Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [email protected] http://www.ch2m.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dewayne Martinez Sent: Monday, September 27, 2010 12:39 PM To: [email protected] Subject: RE: tapping fire lead in for domestic If the domestic was tapped into the lead in before the alarm check and the appropriate backflow preventer was installed in the plumbing line why would this affect the sprinkler calcs? 13 does not require us to add in the domestic demand so I am a bit confused. Dewayne -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thom Sent: Monday, September 27, 2010 10:47 AM To: [email protected] Subject: RE: tapping fire lead in for domestic Taping the fire lead if allowed by the water purveyor, will alter the calc for the fire since now a RPZ must be installed on the riser after that tap for domestic. A re-calc is the only appropriate thing to do. That is after an internal inspection of the existing pipe to determine if the C is even close to 120. (Clean smooth bore) If the interior is anything but smooth it's just a guessing game, unless you run flow tests on each pipe segment. Typically we see these abandoned grocery store when they are at least 30 yrs old, and they never have had any internal pipe inspection done. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Friday, September 24, 2010 9:07 AM To: [email protected] Subject: Re: tapping fire lead in for domestic We are remodeling an an old grocery store, being converted into a church. The existing fire sprinkler is pipe schedule, 3 in lead in. Wet system, alarm check valve with an anti freeze loop. Off of city supply. Existing domestic supply is well water. The owner intends to tap the fire main lead in to run 1" domestic. My concern is that he is creating a cross connection with the fire sprinkler water and anti freeze loop. My secondary concern is tapping the fire sprinkler riser....should i recommend hydraulic calcs since they are modifying the supply of this existing pipe schedule system? I intend to notify the owner of my concerns in writing and recommend he consult with his Architect and Plumbing Engineer. Any recommendations? Forrest Wilson Cherokee Fire Sent from my Verizon Wireless Phone ----- Reply message ----- From: "Ron Greenman" <[email protected]> Date: Fri, Sep 24, 2010 10:26 am Subject: Pool as a water source To: <[email protected]> You can also use the pool for a heat sink for heat pumps and use a solar array to heat the pool to 50 degrees in winter (no freezing and the optimum heat transfer temperature for heat pump efficiency. Engineering kids. We're part of a group building a building. We don't drive the project nor is our part of the project an entity in a vacuum. On Fri, Sep 24, 2010 at 6:16 AM, Jamie.seidl <[email protected]> wrote: > I've done it here in Charlotte. No problems out of it yet, but it was just the secondary source. We had an issue recently on a project that was a few years old where we had to prove the velocity at the roof top pool with a supply calc for the lowest system. The health department accepted it and they re-opened the pool the next week. I would stress 2 inlets. The pool contractor said that the largest inlet had a gpm velocity limit of 1400 gpm? Maybe that was for both? > As far as a vortex plate, when we tested the pool, a vortex didn't develop until we had less than 1' of water left, approx 40,000 gallons already pumped, while my demand was around 32,000 gallons. I still sleep well at night. > > Jamie > Sent from my iPhone > > On Sep 24, 2010, at 8:12 AM, "Dewayne Martinez" <[email protected]> wrote: > >> We have a owner that is requesting us to explore the possibility that >> a indoor pool be used as a water source for the sprinkler system. >> Anybody do this before? Seems like there would be too many problems >> with the chlorine in the water damaging the system components. >> Thanks, >> Dewayne Martinez >> Design Build Fire Protection >> New Berlin, WI >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> For Technical Assistance, send an email to: [email protected] >> >> To Unsubscribe, send an email >> to:[email protected] >> (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email > to:[email protected] > (Put the word unsubscribe in the subject field) > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: AFSA, SFPE, ASCET, NFPA, NFSA, AFAA, ASEE, NIBS, WSAFM, WFC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
