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Mystery pipe

In the attached picture you can see the radiator in my second floor bathroom. The hot water in pipe is dark because I've removed the paint. But you can see a white pipe that goes nowhere coming up behind the radiator. Is that pipe important? Is it something I'd open to bleed air out of when refilling the system? Is it an artifact left over from some previous configuration? Maybe running to an old and now missing expansion tank? Can I get rid of it? I'd like to replace the entire configuration with something that allows for a sink that fits the space a bit better.



Possibly relevant details: It's a closed system hot water radiator system with the expansion tank in the basement. It's gas based, but converted from oil. This is on the top floor so that pipe is the highest point in the radiator system.
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Comments

  • GordyGordy Posts: 3,740Member ✭✭✭✭
    Remnants

    Of an expansion tank in the attic probably.



    You could remove it down to the t in the floor, and cap the open leg of the t. Or replace the t with a 90. The fore mentioned would be easier. The second option would have better flow.



    Hard to tell in the pic, but that is the return from the bottom of the radiator correct?
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  • IbidIbid Posts: 2Member
    Drain pipe

    Thanks for the help.



    We're probably going to yank the whole thing in favor of radiator that fits better so we can turn the sink to a more useful angle.



    Yeah, the mystery pipe is coming up from the water return pipe.
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