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1 Pipe Steam Radiator Offset Reducer Needed...

Steamhead (in transit)
Steamhead (in transit) Member Posts: 6,688
in THE MAIN WALL
to find concentric bushings already tapped, at any plumbing supply house and most hardware stores. This is the way they come from the factory. No need to look for a "blank".

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  • jess askey
    jess askey Member Posts: 11
    Help! 1-Pipe Steam Radiator Reducer Needed....

    Hi Old Timers.... :-)

    Im probably going to be using incorrect terms here but I think I can get my point across...

    I am extending my old 1-Pipe system into another bedroom and found a used radiator that will work perfect. Unfortunately it was plumbed for two-pipe steam so I have some minor work to do. The upper plug shouldn't be an issue but the lower radiator joint has a 2" plug with a bottom tapped 3/4" hole in it. Since Im running 1-Pipe I have 1 1/4" pipe coming up to the new room. I can't re-tap the current bottom plug as the center is wrong.

    Does anyone know of a supplier or have a 2" radiator plug with a 1 1/4" offset tapped FPT hole they would be willing to sell?

    I can also get by with a blank 2" plug as long as it is nice and flat and good for tapping an offset FPT hole. My local machine shop said they could drill and tap it as long as it wasn't an ugly square backed plug.

    Im all the way out in Laramie, WY so we just don't have anyone with radiator parts like the good ole' east coast does!!!!

    thank you for any suggestions....

    steam semi-novice.... jess askey
  • Steamhead (in transit)
    Steamhead (in transit) Member Posts: 6,688
    The plug with the hole

    is called a "bushing". Since the one on your radiator has an off-center hole, it's called an eccentric bushing. That must have been on a Vapor system.

    A standard, "concentric" bushing will work just fine on 1-pipe steam. Note that the size designations on bushings refer to the pipe's INSIDE diameter. So if the outside diameter of the visible threads is roughly 2-inch, the inside diameter is 1-1/2"- the next size smaller. The small hole is probably 1/2", this was the standard size for radiator traps as used on Vapor systems unless the radiator was over 100 square feet or so.

    If that eccentric bushing won't come out, you might have to cut it out with a jigsaw. If you have to do this, make sure you don't nick the threads in the radiator.

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  • jess askey
    jess askey Member Posts: 11


    thank you... I feel much better now that I can actually use the correct words to describe this. I will call around to my local plumbers and see if anyone has blank 2" bushings. I did a quick google search but actually didn't find anything coming up directly that sold 'steam radiator bushings'.

    If anyone on the board might have one, let me know and I will still be happy to support you all over a random place on the internet.

    thank you again...

    jess
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