you could simply leave a single FHV if that's suffieient for your flow; if you start getting in to needing multiples, we'd stick a valved outlet on it and when the test is performed, install a piece of 8" we have with 6- 2.5" FHVs, run the test, take it home for the next time we need to flow a fire pump installed "green" with a flowmeter/no header, or to measure the flow at a preaction riser test valve when trip testing by connecting it to the test tee above the valve. Its not like you use this thing very often- or as Reed points out, like "never".
glc -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Reed Roisum Sent: Monday, July 26, 2010 10:38 AM To: [email protected]; Charles Thurston Subject: RE: Test connection for forward flow testing of backflow What if you don't have a fire pump and the system demand is more than what can be flowed out of the main drain (BTW, how do you measure the flow out of the main drain?) We typically spec a 2 1/2" single outlet (size and # of outlets dependent on the system demand), flush-type test connection with male threads piped from the riser with a normally closed control valve. Is that what you are asking?? Reed A. Roisum, CET Ulteig Engineers, Inc. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Charles Thurston Sent: Monday, July 26, 2010 9:29 AM To: [email protected] Subject: Re: Test connection for forward flow testing of backflow Hello Craig, Fire pump test header for sizes over 2", Otherwise the main drain Monday, July 26, 2010, 8:31:34 AM, you wrote: > Just trying to get a consensus, > Got a backflow in a building at the riser location, what is the > preferred type of connection at the wall which would allow for forward flow testing? > Craig L. Prahl, CET > Fire Protection Specialist > Mechanical Department > CH2MHILL > Lockwood Greene > 1500 International Drive > Spartanburg, SC 29304-0491 > Direct - 864.599.4102 > Fax - 864.599.8439 > [email protected] > http://www.ch2m.com > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > To Unsubscribe, send an email > to:[email protected] > (Put the word unsubscribe in the subject field) -- Best regards, Charles Thurston mailto:[email protected] Coastal Fire Protection/ Myrtle Beach Fire & Safety Group. AFAA Guest Electronic Privacy Notice: This e-mail, and any attachments, contains information that is, or may be, covered by electronic communications privacy laws, and is also confidential and proprietary in nature. If you are not the intended recipient, please be advised that you are legally prohibited from retaining, using, copying, distributing, or otherwise disclosing this information in any manner. Instead, please reply to the sender that you have received this communication in error, and then immediately delete it. Thank you in advance for your cooperation _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
