Im not going to say it was one of those casual assumptions that all systems are calculated nor that all risers have placards. The main thing to keep in mind that the intent is simply to fully EXERCISE the BFP at what os expected to be the system demand. If no data available, a discussion with the AHJ is warranted. As for benchmarks, only the flow is pertinent and pressure is irrelevant.
Roland On Dec 22, 2009, at 2:44 PM, Matthew J. Willis wrote: >> >> On a more important matter: If a system was retrofitted with a >> backflow, > and >> there is no hydraulic calc plaque attached to the riser, and NFPA >> requires >> forward flow testing of backflows, how can you conduct the test >> without a >> benchmark to test against? >> >> What is the recommended practice in this scenario? >> Forest Wilson > > _______________________________________________ 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)
