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Radiator Valves open and close during heating cycle

Kevin_25
Kevin_25 Member Posts: 5
I have replaced all main and radiator valves over the past 3 months in a one pipe steam system but during the heating cycle the valves close and then open to let a burst of steam out and close again within seconds. I have verified my pressuretrol has a cut-in 0.5 and differential of 1 but I never notice any reading on the pressure gauge on the bottom of the pigtail. The pigtail and gauge were both replaced this fall, could they be clogged already? I do drain out the returns weekly. I have also noticed that valves which have replaced have bocome fowled. Help! I'm getting tired of being woken up each morning by the clicking and hissing.

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