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USAV vents?

ChrisJ Member Posts: 15,487
I just got done swapping out almost all of my vents with the Hoffman 1As.  Have two left to do, one of which I need to drill out and install a bushing.

Anyway, most of the vents I pulled off say USAV on them.  A few say USAV 1A which seem to be an adjustable, yet very very slow vent even wide open.

Who is USAV?  Are these vents even worth my holding on to, or should they just go in the garbage can? 
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment


  • BobC
    BobC Member Posts: 5,473

    My local hardware store started stocking those about 8 years back so I used them on a couple of my radiators. My experience with them was not good, they started to spit after a year or two. I'd hang onto one for an emergency replacement and dump the rest.

    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
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