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steam pipe joint rusted solid

mel rowemel rowe Posts: 324Member
Trying to replace the pipe that goes into the radiator inlet valve.  The pipe is too short to match up with the height of the radiator.  Haven't been able to get it to budge.  Tried WD 40 and also used an extender  on the end of my big pipe wrench.  No luck.  Is there something better than WD 40?  Any other suggestions would also be appreciated.  I'm afraid that if I just keep going as is, I am going to collapse the old pipe and create a big mess.    


  • SpeyFitterSpeyFitter Posts: 421Member
    Give it some soaking time...

    Try Liquid Wrench or PB Blaster. Hit it 4-6 times in the course of an hour and let it soak. Then get it with a wrench. If this doesn't work you might have to resort to heat. These fluids are light years better than WD40 for freeing rusted stuck items.
    Class 'A' Gas Fitter - Certified Hydronic Systems Designer - Journeyman Plumber
  • mel rowemel rowe Posts: 324Member
    Stubborn pipe joint

    Thanks very much, Scott.  Sounds like just what I need.
  • heatguyheatguy Posts: 102Member
    heat it with torch

    if you can heat it up with torch the expansion will usually break it free  specially if they used expando as pipe dope 
  • MikeyBMikeyB Posts: 696Member

    Heat it up and place a candle on the joint, it will wick the wax in, if you dont have a candle use a wax ring, both will work
  • Radiator RangerRadiator Ranger Posts: 81Member
    Heating the fitting

    Hi -

    Applying a lubricant several times is a good approach. If you go with heat, be sure to focus the heat on the fitting you're trying to remove and not the entire radiator. On those extra stuck fittings I've had good luck when another person taps lightly on the fitting I'm removing as I try to untwist it. I try to maximize leverage with the radiator in a position to support this, a leverage bar etc. Also, sometimes I can get it moving by tightening first then loosening once I've budged it. If the pipe does collapse, you can carefully remove it using a hack saw and chisel (saw several pieces of the fitting (careful not to bunge the threads), then chisel the pieces apart. Twisting the fitting out is of course the least time consuming and risky). I hope this goes well!

    Gwen Healy - Radiator Ranger
    Gwen Healy - Radiator Ranger
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