Rut Roh....Water heater bypass valve kaput?
So went to winterize this afternoon and wouldn't ya know it, the water heater bypass valve wasn't bypassing cuz antifreeze was going into heater! UGH! Doing some research, it's one of those Thetford 9...
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If you have the single handle to by pass , that is probably not your problem. When they went to the single handle bypass method, they put a one way check valve on the top line of water heater. It is letting water back into heater, which it should not be doing. They are around ten bucks and just screw off, after you remove the water line.
