Well, there might be a few more items in the definition of a check valve that could influence that. Sans a blockage and in normal operation, the rainwater leaders on my house only allow flow in one direction, but they're not check valves. And before you add that backup CAN occur, same can be said with abnormal condition of a check valve, where a foreign object (blockage) can lift the clapper off the seat and allow 2-way flow.
And they'd have to be LISTED or APPROVED as checks, like the prior discussions on backflow preventors "not" being a check valve on a source of supply. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Greg McGahan Sent: Thursday, February 14, 2008 12:06 PM To: [email protected] Subject: RE: Check valve on floor control assembly Because a PRV acts like a check valve and the new ones are actually listed that way. Water can only flow one way, so it IS a check valve. Thank you, Greg McGahan Living Water Fire Protection, LLC 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 Fax: 850-937-1852 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, February 14, 2008 10:53 AM To: [email protected] Subject: RE: Check valve on floor control assembly Huh? How is one related to the other? Craig L. Prahl, CET Fire Protection Group 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.lg.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Minkel Sent: Thursday, February 14, 2008 11:41 AM To: [email protected] Subject: RE: Check valve on floor control assembly If you have a pressure reducing valve you don't have to have the check valve. Bill Minkel, Designer Western States Fire Protection, Dallas NFPA Member #2578666 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
