Easy. Calculate GPM through the 1" pipe and fittings in drain line. Doubt you will 100 gpm.
Art Tiroly ATCO Fire Protection/Tiroly 24400 Highland Rd CLE 44143 216-621-8899 216-570-7030 cell -----Original Message----- From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Roland Huggins Sent: Tuesday, April 26, 2016 2:46 PM To: sprinklerforum@lists.firesprinkler.org Subject: Re: Forward Flow for a Backflow Preventer I did an article in Sprinkler Age (2013 but not sure which issue) on ow to calculate it as well as other options for the forward flow test. Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Apr 26, 2016, at 10:15 AM, James Crawford <jcrawf...@phaserfire.ca> wrote: > > I know this has been discussed but can’t seem to find it. > > > > NFPA #13 (2013) 8.17.4.6.1 Means shall be provided downstream of all > backflow prevention valves for flow tests at system demand. > > > > We have a small office system, system demand 160 gpm, we have 100 psi > static pressure, the system has a 2 ˝” riser so a 1 Ľ” drain, how much > water can we get out of an 1 Ľ” drain? > > > > Is there anything out there to help determine the size and or number > of outlets required to forward flow at different system demands? > > > > > > Thank you > > > > > > James Crawford > > Phaser Fire Protection Ltd. > > Phone 604-888-0318 > > Fax 604-888-4732 > > Cel 604-790-0938 > > Email jcrawf...@phaserfire.ca > > > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
