Drains at floor control valves are auxiliary drains regardless of the sign you put on it. It's purpose is to drain the water beyond the sectional control valve. If you have a flow switch on each section then you need an inspectors test port and it needs a sight glass (if discharge cannot be seen) with an appropriate orifice (k factor) for tresting the flow switch. A test and drain fitting will properly have two different flow points on the valve: the first flows water through the orifice and the second fully opens the valve.
On Wed, Apr 11, 2012 at 11:03 AM, Greg McGahan <[email protected]>wrote: > Well, that changes my perspective a but doesn't it. > > On Wed, Apr 11, 2012 at 1:02 PM, Greg McGahan <[email protected]> > wrote: > > > The main drain test doesn't necessarily verify the operation of the flow > > switch. If it does, then usually it is a test and drain. And in many > cases, > > there is not a huge difference in flow between the 1/2" orifice on test > and > > the full 1" orifice when on drain if it is being fed from a stand pipe > with > > a pump. > > > > We flow them all, but we get asked why we are flowing so much water when > > the previous inspectors did not. Of course we give them the proper answer > > about doing things right, but I wanted to check ourselves. > > > > > > Greg > > > > On Wed, Apr 11, 2012 at 12:54 PM, <[email protected]> wrote: > > > >> If the individual floor control valves have their own flow switches > >> flowing only one system wouldn't provided verification of operation of > the > >> individual flow switches. > >> > >> > >> > >> Craig L. Prahl, CET > >> Fire Protection > >> CH2MHILL > >> Lockwood Greene > >> 1500 International Drive > >> Spartanburg, SC 29304-0491 > >> Direct - 864.599.4102 > >> Fax - 864.599.8439 > >> CH2MHILL Extension 74102 > >> [email protected] > >> > >> > >> > >> -----Original Message----- > >> From: [email protected] [mailto: > >> [email protected]] On Behalf Of Greg McGahan > >> Sent: Wednesday, April 11, 2012 1:47 PM > >> To: [email protected] > >> Subject: main drain test > >> > >> When you have a building with multiple floor control valves I have the > >> following question: > >> > >> If the intent of the main drain test is to test the supply, can you > >> accomplish that by flowing the largest or the furtherest from the riser > >> instead of flowing each one individually? > >> > >> Thanks, > >> > >> -- > >> Greg McGahan > >> Living Water Fire Protection, LLC <http://www.livingwaterfp.com> > >> 1160 McKenzie Road > >> Cantonment, FL 32533 > >> 850-937-1850 > >> fax 850-937-1852 > >> -------------- next part -------------- > >> An HTML attachment was scrubbed... > >> URL: < > >> > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120411/6df53a7f/attachment.html > >> > > >> _______________________________________________ > >> Sprinklerforum mailing list > >> [email protected] > >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >> _______________________________________________ > >> Sprinklerforum mailing list > >> [email protected] > >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >> > > > > > > > > -- > > Greg McGahan > > Living Water Fire Protection, LLC <http://www.livingwaterfp.com> > > 1160 McKenzie Road > > Cantonment, FL 32533 > > 850-937-1850 > > fax 850-937-1852 > > > > > > > -- > Greg McGahan > Living Water Fire Protection, LLC <http://www.livingwaterfp.com> > 1160 McKenzie Road > Cantonment, FL 32533 > 850-937-1850 > fax 850-937-1852 > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120411/b42490ac/attachment.html > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > -- 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: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120411/e1e10bd2/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
