· Master Mariner
- Reaction score
Absolutely necessary. If I remember right, w/o the check valve you get no cold water, only hot and luke warm, as the hot water mingles w/the incoming cold.
Would it be difficult to add a T with a valve for draining, between the tank and the check valve?The problem I have with that check valve is in draining the hot water heater for winter storage. I was hesitate about removing that fitting thinking that I might damage the heater tank so normally I just apply air pressure and try to blow out as much water from the tank through the faucet and then add the good old pink stuff.