Replacement Manifold Air Vent
Mfr Part#: SSM406
3/8" NPT replacement automatic air vent for SSM (stainless steel) and BSM (brass) series radiant heat manifolds. Comes with an outlet cap for pressure testing purposes.
how does the manifold air vent work
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It works in the same manner as a regular air vent: when there's air in the system, the internal float sits low and pulls open the air bleed valve; as the air gradually escapes and water level rises, so does the float; when float reaches top position, it mechanically closes off the air bleed valve.
Answered on 7/30/2012 by PexUniverse Customer Service