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 how much flex can I put on a type L hard copper pipe?
Author: sum (FL)

I know hard copper pipe can flex a little.

I need to run a 1/2" type L copper pipe along (in other words parallel) an interior wall through the wall cavity. It will be passing through five 2x6 wood studs before getting to where I need it to. If I drill five 3/4" diameter holes through each of these studs, and the studs are spaced 16" on center.

Do I have any chance of flexing & finessing this long 1/2" pipe through these holes? Or do I need to cut them in short sections and solder a coupling between each pair of studs?

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 Re: how much flex can I put on a type L hard copper pipe?
Author: hj (AZ)

It depends on how far back from the surface these holes are drilled.

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 Re: how much flex can I put on a type L hard copper pipe?
Author: sum (FL)

The center of the holes will be about 1.5" from the face of the studs.

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 Re: how much flex can I put on a type L hard copper pipe?
Author: pbw (OH)

drill the hole closer to the edge so there is less chance of bending or kinking the copper pipe. add a metal stud guard for protection

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 Re: how much flex can I put on a type L hard copper pipe?
Author: jblanche (WI)

I was able to persuade a 1.5" PVC line in between studs with a little mechanical help. Different material, I know, but 1/2" Type L through a 3/4" hole can't be much tougher.

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Links to the State of Wisconsin Plumbing Code:
[docs.legis.wisconsin.gov]
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I am not a plumber.
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 Re: how much flex can I put on a type L hard copper pipe?
Author: Curly (CA)

Drill a 1-3/8" hole, slide pipe thru, then install pipe insulator to support pipe etc...

[www.ipscorp.com]

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 Re: how much flex can I put on a type L hard copper pipe?
Author: sum (FL)

That's pretty amazing you are able to thread that pipe through. I think the 1/2" copper will be much more flex tolerant due to such difference in diameter.

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 Re: how much flex can I put on a type L hard copper pipe?
Author: sum (FL)

1-3/8" hole? The pipe is only 1/2" nominal. I plan on putting some sleeves but not this big.

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 Re: how much flex can I put on a type L hard copper pipe?
Author: hj (AZ)

You should be able to flex it that much.

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 Re: how much flex can I put on a type L hard copper pipe?
Author: packy (MA)

make the first hole a bit larger and close to the edge. after that the rest of the holes can be in the center. do use a stud guard on the first hole..

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 Re: how much flex can I put on a type L hard copper pipe?
Author: steve_g (CA)

The insulators that Curly was talking about look like this. I personally like them:

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 Re: how much flex can I put on a type L hard copper pipe?
Author: Curly (CA)

Thanks Steve g - good picture.

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