Radiator Valves

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Ed from chicago, Oct 30, 2005.

  1. Ed from chicago

    Ed from chicago Member

    Apr 25, 2005
    Hi all!

    Can you please discribe the difference between a steam radiator valve and one that controls the flow in a a hot water system. And whether they are interchangeable.


  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    A steam valve is a globe valve with a fiber disc washer and it closes by turning the handle until it stops. It turns off the steam completely or you would have condensation problems in the radiator. A hot water valve turns off by rotating a cylinder to close the opening. The cylinder has a small hole in it to allow a minimal amount of water to flow through the radiator. A steam valve can be used for hot water, but a hot water valve cannot be used for steam.
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