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PRV on boiler still dripping

14 years ago

we have an older weil-mcclain boiler set at 180 and 12# pressure with a 4 year old t-30 amitrol exp tank. replaced a dripping PRV a year ago with an B&G/ ITT 30 psi valve that still drips. i have tripped it many times thinking there might be a slug of crud on the washer. can these valves sometimes be faulty? any thoughts as to how i can correct this? i don't mind buying another valve if will fix the problem this time. thanx in advance for your reply.

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