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How to tell if Steam Trap is Bad?

Dairon421 Member Posts: 47
Hey i was just wondering what are some ways to trouble shoot steam traps


  • JohnNY
    JohnNY Member Posts: 2,739
    Check temperature differential between inlet and outlet. It can be tricky at different points during the heating cycle but there should generally be a 10° difference.
    I use a sonic measuring tool that listens to the trap opening and closing. Or not.
    Contact John "JohnNY" Cataneo, Master Plumber
    in New York
    in New Jersey
    for Consulting Work
    or take his class.
    JUGHNE Member Posts: 8,927
    The cheapest ($350) FLIR gun has been my best tool for this.
    Especially if you can follow the return pipe for a foot or 2 away from the trap.
    BTW, this is for rad traps not F&T.

    Has anyone tried the doctor stethoscope on the traps for the sound?