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Cast radiator steam valve hole stripped

John Shea
John Shea Member Posts: 247
you'll probably want to drill and tap for 1/4" NPT. Then use a 1/4" to 1/8" bushing.


  • Vinnie_2
    Vinnie_2 Member Posts: 1
    Cast Iron Steam Radiator Valve Hole Stripped

    What is the most simple way to re-thread the hole into which the radiator steam valve screws on a cast Iron radiator? I believe the hole opening is 1/8" in diameter.
  • Big Ed
    Big Ed Member Posts: 1,117
    1/8\" Pipe tap

    You need a 1/8" pipe tap. Turn in the tap1/4 turn clock wise in , then 1/8 turn counter clock out...Continue until threads are redone. This action will prevent the tap from binding ,thus breaking which would suck.....
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