FYI on return mixer valve
Just to be aware. I had a recirculating pump installed years ago and eventually the return mixer valve clogged up and the pump kept trying to pump water. Long story short the hot water line burst at an elbow in a closet wall and flooded closet, spare bedroom and garage. Luckily friends happened to check the house that day, as we were away. Shut off water from hot water tank before we had 60 gallons of warm water (tank set to low while away) over whole house. Cut short our Xmas visit with family
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