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Old 03-13-2008, 12:13 AM   #1
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How to protect 3/4" copper pipe passing through concrete


I have a split level and need to drill through concrete for a 3/4" copper pipe from my boiler to some baseboard radiation. Any recommendations for the hole size, and what to line it with so that the heat-up/cool-down expansion and contraction doesn't wear my pipe?

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Mike

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Old 03-13-2008, 12:25 AM   #2
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How to protect 3/4" copper pipe passing through concrete


Core a 1 3/4" hole and insert a piece of 1 1/4" ABS then feed your copper through. seal the ABS to concrete with hydralic cement, seal the copper to ABS is some low expansion foam.

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Old 03-13-2008, 12:37 AM   #3
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How to protect 3/4" copper pipe passing through concrete


Thanks Chris, much appreciated.

Mike
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