Were/are there any leaks in the dry valve or trim?
At 11:39 AM 7/9/2009, you wrote: >Very little grooved, just repairs made in the last 10+ years. It's all >Sch40 threaded, 1"-4", threaded flanges. This is just our 3rd year here, >last year when we did a full flood we attached a pump and took it to 200 >looking for leaks but couldn't find anything. I'm thinking the leak is >concealed behind old plaster walls. It does an unheated attic, traditional >piping arrangement. I'm guessing 40 years old with a 15 year old dry valve >and compressor. I'm told the compressor runs about once a day for a few >minutes. They lost power last Friday and the valve tripped about 4 AM on >the 4th, I spent most of the morning chasing low points and resetting it. >The compressor was tripped out so I'm thinking it went out on overload from >running so long, I did mention it shouldn't and suggested rewiring it to the >generator. It's a long term care facility right near NFPA in Quincy. I'm >aware of the allowable leakage but sometimes (like this) have a hard time >applying it. I did consider a scent test but if we couldn't even find a >drip at 200, would this help? >I'm getting splinters scratching my head but I have tweezers. >TD > > > >We have done this a couple times and have always replaced the compressor. >However, a word of warning inspired by learning the hard way. Assuming this >is a grooved system, when you drop the pressure the entire thing can start >leaking like a sieve. Older couplings can be a little brittle and less >resilient. They just don't like to seal correctly under the lower pressure. > >Best of luck! > >Lori Kitchen > >_______________________________________________ >Sprinklerforum mailing list >http://lists.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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ Sprinklerforum mailing list http://lists.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)
