Automatic Sprinkler Handbook, 2013 edition Page 454 tells us we cannot reverse the check valve in the FDC as a means to perform a forward flow, except for those systems that did not have backflow devices at the time of sprinkler installation.
Question # 1. Can we replace the check valve with a pipe, and then do the forward flow? Question # 2 Can we tie the clapper in the open position, and then do the forward flow? Question # 3 Can we have a licensed plumber remove the checks in the backflow device, and then do the forward flow? (In Oregon, sprinkler people are not smart enough to work on backflow devices, even if we are licensed to test back-flows) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
