My guess is that usage comes from standpipe calculations that require the 250gpm per valve up to the required flow. I do not recall a requirement on how may valves to provide for a specified system demand for testing the backflow preventer.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Easter, Timothy Sent: Friday, March 29, 2013 10:58 AM To: [email protected] Subject: determining number of outlets for test header I am use to providing one 2 ½" connection for every 250 gpm of system demand. I do not know where this requirement came from nor do I know of any requirement. Does anyone know of such a requirement? Regards, Timothy Easter E.I.T. Graduate Fire Protection Engineer URS Corporation 11832 Rock Landing Drive Suite 306 Newport News, VA 23606 Direct: (757) 383-6217 [email protected]<mailto:[email protected]> This e-mail and any attachments contain URS Corporation confidential information that may be proprietary or privileged. If you receive this message in error or are not the intended recipient, you should not retain, distribute, disclose or use any of this information and you should destroy the e-mail and any attachments or copies. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130329/4f685e89/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
