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Old 01-18-11, 09:33 AM   #11
Indyplumber
Lurking Renovator
 
Join Date: Jan 2011
Location: Indiana
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Default Materials used for tube-in-tube exchanger

I saw in a few of the photos you were using a PVC adapter to connect to the tank. As a plumber I would recommend using a CPVC adapter, the difference being that CPVC is suitable for hot water piping whereas PVC is for cold water use only.

One question I have is would the efficiency be greater is the solar heated liquid circulated through the outside tube instead of the inside tube? Im getting ready to build my own system and thought it would be better that way.

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