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rwalter7

pipe hangers

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I noticed the other day that my baseboard hot water pipes are just hanging by the pipe itself. The plastic pipe hangers have cracked and broken I assume from the heat of the pipe. I was thinking of using U shaped metal types by screwing them into the rafters instead but they are made of steel. Any issue using steel against copper tubing? I'm thinking 2 things. Dissimilar metals and metal to metal wear from friction due to expansion and contraction. Not sure if I'd live long enough to see a failure.

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 Use the steel but put something non-conductive between the pipe and hanger, a piece of rubber or innertube. Galvanic corrosion from stray electrical charges and cold water pipe grounds will take their toll eventually.


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Sounds like they are breaking under the pressure from lengthwise expansion. Try getting some reznor hooks. I like to loop them around the tubing, then nail em in. Get them copper coated for your application as mentioned by the other guys.

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Some of those plastic suspension hangers just break. Could have been from expansion and contraction. I normally don't use plastic suspension on copper heat for the reason you just experienced. Personal choice. If you are tight against the joists you can use a simple copper clip from underneath. If there is a gap between joist and copper you can use a piece of wood fastened to the underside of the joist. A quick and easy method that I use is a "natick" style hanger. Naticks can be bought in varied size and length starting at less then a buck for 1/2". I suggest using 2 screws per hanger.

 

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