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Re: retro hot water recirc
Here's the system drawing. It really is a simple setup as supplied by Watts. in addition to the pump it's just a simple thermostatic mixing/cross connect valve (the black plastic item in the picture from the earlier post) and a couple of flex hoses. But the natural recirc effect is such that one would have warm pipes all the time. Not a problem now but will be in air conditioning season. Hence the solenoid valve to secure the recirc path when not wanted, and the spring check bypass to allow cold to flow to faucet when the solenoid valve is shut. Works like a charm. :-)
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