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Old 11-15-11, 09:54 AM   #7
strider3700
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Join Date: Dec 2008
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I have a vertical 4' stretch of easily accessible 3" copper drain in the main stack just before it exits the house. this is only a couple of feet before the hotwater heater. I suppose I could hand wrap it with 3/4" soft copper and try it but yeah the cost of that copper is going to be pretty high.
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