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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120411/fd624437/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
