Suburban hot water heater questions

Thank you.

Suburban uses a 3/4" NPT T&P Relief Vlave

Some water heaters have check valve in cold inlet AND hot outlet
Some have cold inlet
Some have hot outlet
Some NONE

80%......yours has one in HOT outlet

DutchmenSport wrote:
I've never actually compared them, but I feel pretty certain the pressure relief valve is threaded the same. Check the valves though, I do think they come in different temperature settings, at least, they use to.

If you have a single valve water heater by-pass on your water heater, then yes, you do have a check valve on the hot out side.

If you have a 2 valve water heater by-pass, you might have a check valve on the hot out side.

If you have a 3 valve water heater by-pass, you probably do not have any check valves.

Thanks...I don't know how many by-pass valves I'll have to check.

I've never actually compared them, but I feel pretty certain the pressure relief valve is threaded the same. Check the valves though, I do think they come in different temperature settings, at least, they use to.

If you have a single valve water heater by-pass on your water heater, then yes, you do have a check valve on the hot out side.

If you have a 2 valve water heater by-pass, you might have a check valve on the hot out side.

If you have a 3 valve water heater by-pass, you probably do not have any check valves.