Quote:
Originally Posted by rwest
My quick guess is the blue is cold water coming in from the ground to the heater and branching off to fixtures in the house, the red is heated water going to fixtures too and the white is recirculating water- even though it is on demand, people still have a recirc system that operates in different fashions, some are on a switch; maybe even a motion sensor to get the hot water ready.
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Doh! I see red and blue pex all the time and it didn’t dawn on me the blue pex in the picture is the cold water to the house. 😂