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PVC pipe for steam

gibson Member Posts: 15
Is it feasible to replace old steel returns on a steam boiler with PVC pipe? Afterall, the PVC can take the heat, it can take the pressure, and it will never rust. It has some insulative properties, too.


  • Jamie Hall
    Jamie Hall Member Posts: 22,947

    Well, I've seen CPVC rated at 180 F. Is there some rated at 212? If not, I'd be kind of worried if something bad happened and steam got into a return (Murphy is alive and well, and living in the basement), might you not have a problem?
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Anna Conda
    Anna Conda Member Posts: 122


    Max operating temperature of 158F, melting point of 176F... falls a bit short of the 212F needed to create steam at sea level atmospheric. Steam under a pound or two of pressure, falls well short. It could certainly be done, but I wouldn't expect it to last any significant length of time.
  • Big Ed
    Big Ed Member Posts: 1,117
    What I See ........

    ......with PVC laying on the concrete floor is a crack.
  • After long deliberation


    Ed Carey
  • Jim Farrell
    Jim Farrell Member Posts: 46


    You should noteven use copper but some people do...

    Steel Pipe allows for expansion and contraction...
  • Glenn Sossin_2
    Glenn Sossin_2 Member Posts: 592

    PVC Sch40 begins to denature at 140F. Its ability to withstand pressure drops severely as the temperature approaches that number.

    It's like a piece of speghetti (sure I spelt that wrong). Its hard until you cook it. It will be come a limp noodle if overheated - useless. Exceptionally bad idea.
  • Jim

    Why should copper not ever be used on steam returns ?
  • Mad Dog!!!!!!!!
    Mad Dog!!!!!!!! Member Posts: 157
    Sure...give it a try...................................

    your house first. Are you serious? Mad Dog
  • Weezbo
    Weezbo Member Posts: 6,232
    Step Away From The Purple Primer !

    And Leave the Glue alone while you are at it *~/:)

    you didn't conceive of this idea in a small closed room ...:) put the lid back on the cans ... the fumes are like the old bathroom tile glue..it doesn't allow you to do your finer thinking...like don't start focusing on brain surgery or anything along those lines while in that room...

    all in fun. you wouldn't want to do that with pvc..it would melt and look like a squished macaroni ...maintaining Pitch would be a bugger...
  • gerry gill
    gerry gill Member Posts: 3,078
    Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.

This discussion has been closed.