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3/4" copper expansion elbow

what is the name, part number and where to buy a 3/4" copper expansion elbow used to solve hot water baseboard pipe noise every time the heating system comes on. it looks like a 3/4" copper elbow brazed to 3/4" copper bellows and is soldered into the heat pipe to take up the expansion.

Re: 3/4" copper expansion elbow

I have never seen expansion ells. But have used many expansion joints. Most of your expansion takes place in the run of the baseboard. These couplings are designed to take up that expansion.


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