I have a 1 pipe low pressure steam system and would like to replace the air valves on the radiators. The current valves are Hoffman No. 2 vacuum valves. When I look online, all I see is non-vacuum valves - like the Hoffman Model1A PartNo.401422 Air Valve (non-vacuum).
I talked to a great steam system guy years ago (he is no longer around) and he told me to always replace the radiator valves with VACUUM valves.
It seems like it is important to have the right valves in the radiators - but I am wondering if there is another thought about using non-vacuum valves today ?
And if not, where do I find replacement Hoffman No.2 vacuum valves ?
I talked to a great steam system guy years ago (he is no longer around) and he told me to always replace the radiator valves with VACUUM valves.
It seems like it is important to have the right valves in the radiators - but I am wondering if there is another thought about using non-vacuum valves today ?
And if not, where do I find replacement Hoffman No.2 vacuum valves ?