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Thermostatic Radiator Valves

ChasMan Member Posts: 462
On a one pipe steam radiator, would a thermostatic radiator valve replace the radiator's supply valve, or would it go where the radiator's air vent is?

What is the advantage of a thermostatic radiator valve?



  • Mark Hunt_6
    Mark Hunt_6 Member Posts: 147
    On a single pipe

    system, the TRV installs in the air vent tapping. You still need the vent, but the TRV is installed ahead of the vent. A vacuum breaker is installed before the TRV.

    Benefit of the TRV is temperature control apart from an electric thermostat.

    Keep in mind that the TRV's are non-electric and have no communication with the boiler.

    Hope this helps.

    Mark H
  • TRV'S

    i think that TRV'S should be installed as a last resort, after getting the system working as well as the original installers designed it. the "dead men" were very good at sizing radiators for various rooms, number of windows, etc.

    if your system is perfect, and there HAVE been changes in room-sizing then you might need them.otherwise get your system in top notch condition first!--nbc
  • David Nadle
    David Nadle Member Posts: 624
    Last resort is a bit harsh

    A perfectly balanced system on design day is not a perfect system for comfort all season long. Your upstairs may be sweltering in October. That's where TRV's come in. They work well and are easy to add to one pipe steam.
  • maybe a bit harsh

    maybe i was uncharitable to the designer of the TRV; however it could be another thing needing repair, or replacement as time goes by.

    more to the point i was trying to make was that the first priority in steam system restoration should be getting everything working as well as possible. then if needed put in some TRV'S

    if you put them on first, they could be masking another problem--nbc
This discussion has been closed.