The problem may be the auxiliary underground not be drained, I have seen dry systems not fully drained taking considerably longer to trip than when it was fully drained. The trapped water may be delaying the trip time of the dry valve. Bill Cunningham
Sent from my iPhone > On Jun 16, 2016, at 6:37 AM, Charles Thurston <[email protected]> wrote: > > Hello Sprinklerforum, > > I am sure this topic has been exhausted in the past, but I did not find a > definitive answer anywhere. Does anybody still make an exhauster for Dry > Sprinkler systems. We are having issues whit a system installed many years > ago. Water delivery is 4-5 minutes to the inspectors test. > > System starts out in building A as a 6" runs across the building feeding > sprinklers in it, Then drops 12 feet to go underground 25 feet to building B > and comes back up. This pipe underground is holding water. Open Inspectors > test and it is 2 minutes before you start to see the sir gauge at the riser > start to drop. We have written it up on inspections for years as too long of > a trip time and the AHJ never said anything to our customer so they would get > it fixed. NOW the AHJ will not let a remolded store open because the trip > time is too long. The AHJ also "insisted" they install a waterflow switch for > this space, NOW it had a Vane type switch on the dry pipe. > > -- > Best regards, > Charles mailto:[email protected] > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
