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Old 03-01-16, 11:18 AM   #8
oil pan 4
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Join Date: Nov 2012
Location: NM
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I don't see any point in wrapping a worm around the sewer pipe. All the out going water in the sewer pipe is almost never deeper than 1 inch and does not stay in the pipe for very long unless you have problems.
If a worm were wrapped around the pipe only the edges of the 2 pipes would be in contact, through the walls of the pipes.
The way I propose is more like a heat exchanger.

Originally Posted by gtojohn View Post
What would you heat with the waste water?
Incoming utility water.
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