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Taping a steam main

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boiler_man
boiler_man Member Posts: 21
in Strictly Steam
I've been trying to tap a stem main to add venting so that it heats up quicker (master venting) but although the tap is rated for 1/8 and the black pipe stem I am using to mount the Hoffman 75 is 1/8, I feel as the pipe is a bit loose and I do get some water leaks. Please advise...

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  • Steamhead
    Steamhead Member Posts: 16,856
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    Tap it bigger

    3/8" minimum. That vent is too heavy for 1/8" pipe to properly support it.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • Rod
    Rod Posts: 2,067
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    Tapping a Steam Main

    Hi- As Steamhead mentioned, you want to use a larger pipe size. I used 1/2 pipe on the last one I did which size wise, will support 2 Gorton #2s.   If you find things are a bit loose, use some JB Weld  as a fillet around where the pipes join. If you aren't familiar with it, JB Weld is a high temperature epoxy (500deg.F) that can be used on engines and transmissions. Most autoparts stores carry it. It comes in two little tubes which you mix together. Clean and sand both the pipe and around the hole in the main so the epoxy will have good adhesion.

    - Rod
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