The dry pipe valve opens when the air pressure is released. Not sure how air tight the hose valve is. In any case I would think electric actuation of the PA valve may be better. If the hose valve is air tight, off the top of my head, I can't see any problem with a double interlocked system as well. Maybe someone would correct me on that.
Tony -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Greg McGahan Sent: February 24, 2010 5:22 PM To: [email protected] Subject: RE: pull stations This is a horse of a different color. It is a 9 story Motel with 2 levels of PG underneath. The PG is approx double the footprint of the upper levels and above the 2nd level of parking there is an outdoor pool deck 150' long or so. There is also one stubby stairwell that goes from the 1st level of PG to the 2nd level and stops. The AHJ required a hose valve in the stubby stair and one on the Pool Deck. Since both of these Valves are exposed to freezing temps, the AHJ wanted a Non-Interlock PA valve to feed these 2 Hose valves with a pull station adjacent to each HV. FD pulls stations, activates Solenoid at PA valve and they have water to formerly dry Standpipes. Seemed like a straightforward approach to me, although a simple Dry Standpipe with a Dry Valve would probably have worked just as well. I can't remember why he would not allow that. Greg McGahan Living Water Fire Protection (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, February 24, 2010 4:40 PM To: [email protected] Subject: RE: pull stations Is this pull station located at the riser next to the PA valve to comply with NFPA 13, 7.3.1.2 or is it somewhere else? How is it tied into the PA system, I seemed to miss that description. Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, 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 Greg McGahan Sent: Wednesday, February 24, 2010 5:32 PM To: [email protected] Subject: RE: pull stations EOR just called me again, and I quote: "Fire alarms are life safety and supposed to go off way before the sprinklers activate. Sprinklers are for property protection and not life safety. This has been drilled in to me through training" He said the fact that the Potter website references NFPA #72 stating that failure of the (releasing panel) shall not impair the operation of the sprinkler system proves that.....(I don't get that either) Well now I know, and here I have been thinking that what I do is important. But the pull station/releasing device problem is solved at least. Greg McGahan Living Water Fire Protection (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Greg McGahan Sent: Wednesday, February 24, 2010 1:51 PM To: [email protected] Subject: RE: pull stations No, that would be too simple.... I am the contractor and the EOR is saying it in is in our scope of work, no big deal. The issue is that he didn't want the "releasing devices" tied into the alarm system and wanted them installed in accordance with NFPA #13. The "RD" specified by the AHJ to be electric (this is the AHJ's brainchild/requirement) and that it should electrically release the solenoid on the Preaction valve. He said NFPA #72 doesn't apply to the "RD's". I said no way. BTW, the AHJ said no way as well. He wants the "Pull Stations" monitored for integrity, so if there is a bad wire, etc they get a trouble signal. Greg McGahan Living Water Fire Protection (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Forest Wilson Sent: Wednesday, February 24, 2010 10:32 AM To: [email protected] Subject: RE: pull stations I would suspect the problem is the EOR may be telling the sprinkler contractor it is his scope of work, not the alarm contractor scope of work. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, February 24, 2010 11:22 AM To: [email protected] Subject: RE: pull stations Ok, so is there a problem with his definition? By NFPA 72 definition a pull station is an initiating device. Its actuation initiates a response. So in the case of the preaction system it is an initiating device since it initiates opening of the PA valve. Whatever it's called, whether it be pull station or releasing device is pretty much irrelevant. Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, 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 Greg McGahan Sent: Wednesday, February 24, 2010 11:03 AM To: [email protected] Subject: pull stations Got an engineer telling me that a "pull station" wired to a non-interlock pre-action system is NOT an alarm device and is part of the sprinkler system per NFPA #13. He is calling it a releasing device and not a "pull station" by definition. ???thoughts? Greg McGahan Living Water Fire Protection (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 _______________________________________________ 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) _______________________________________________ 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)
