Noisy Air Valve

GreyWolf · 2 Dec 2008

Hi, I have an issue in an older apartment building where the air valves make a loud air hissing sound and they spit water. The air valves are hoffman 40 and the building uses steam heat. Do you have any suggestions on how to reduce the noise these things produce? Thanks

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Noisy Air Valve

GreyWolf

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