Quote:
Originally Posted by BSiple
My system sounds a lot like Look’s.
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That's the way it suppose to be done. I used my own house as trial and error about 15 years ago when tankless heaters started to gain popularity, a time when most plumbers were not used to having a heater shutting off, so they wired pumps to run continuously like a tank unit. They were getting into all kinds of issues. We replaced so many screwed up installs. We finally has to train my plumber on how to install these thing correctly so he can service our clients (thankfully that type of work stopped). Most good plumbers get it now, finally.