T&P pressure relief valve leaking on a superstor ultra

I just purchased my new home and have been having trouble getting the T&P relief valve to stop leaking. I have a boiler and of course oil heats the hot water. I knew about this when purchasing the home after the inspection and tried to get the owner to fix it but he refused. I never knew it was going to be this annoying to resolve.

What I have done:
Replaced valve on the water heater
Adjusted the water temp on the knob of the superstor(the water temp from the tap was 132 degrees)

I have not replaced the expansion tank and I have no idea what the water pressure is. Any ideas? This problem is wearing me down. Any help is greatly aporeciated!

The water heaters temperature pressure relief valve is designed to go off when the temperature exceeds 210 degrees Fahrenheit and the pressure exceeds 150 psi I highly doubt your water pressure is 150 PSI if it's just a trickle coming out of the valve I would check the expansion tank

But, the water pressure should be checked shouldn't it? It may be excessive surge pressure from municipal or the TET is defective. The TPRV may be defective.

Buy a gauge and leave it on say the laundry tub faucet for 24hrs and it will record any high pressure events.

It's doing it's job. You are exceeding pressure. May do you good to check that expansion tank.

Should I just buy an expansion tank? Nothing else appears to be working.

Your expansion tank could be full of water and not doing its job

What I have done:

Replaced valve on the water heater

Adjusted the water temp on the knob of the superstor(the water temp from the tap was 132 degrees)

Click to expand...

You know, the thermostat may be bad. Being on a boiler system it might be best to let a boiler specialist chime in.

Well if this helps the valve only seems to leak when the boiler is running which ends up filling a pretty big mixing bowl over the course of a day. It's not a steady leak all day but more of a large discharge a few times a day.

What is the temperature set on the water heater

I adjusted the heat down but there is no gauge that I can see that tells me how hot it is

When the house was inspected the water temp was 132 degrees

On your water heater there should be some type of box knob either on top or on the side

It's been a while since I've responded to the forum - lots going on... the expansion tank is full of water. I drained a bit of water and I also checked the pressure after draining a bit of water from the water heater and turning off the water supply to the heater and main supply... the pressure still reads 60. I guess I am perplexed as to what's going on.

I did end up buying a new expansion tank but I can't get the current one off the piping. There's a heavy amount of putty on the valve

If anyone has any pointers or insight please let me know.

It is most likely thread sealant.

Can you post photo(s) of the complete install (boiler and WH) and the TET install?

Were you able to get the WH water temp down to 120 degrees? 132 can scald and/or cause thermal shock.

Again, the water pressure should not exceed 40 to 60 PSI (personal preference) (80 PSI MAX) at any time-

KULTULZ said:

But, the water pressure should be checked shouldn't it? It may be excessive surge pressure from municipal or the TET is defective. The TPRV may be defective.

Buy a gauge and leave it on say the laundry tub faucet for 24hrs and it will record any high pressure events.

Click to expand...

What is the TET air pressure?

Cbud83 said:

If anyone has any pointers or insight please let me know.

Click to expand...

wrap your arms around it and twist, if it still wil not come loose,
make a strap wrench using a garden hose and a pipe wrench

do you have a pressure reducing valve in your system

after the meter before the house ?


you can stop excessive pressure from there

KULTULZ said:

It is most likely thread sealant.

Can you post photo(s) of the complete install (boiler and WH) and the TET install?

Were you able to get the WH water temp down to 120 degrees? 132 can scald and/or cause thermal shock.

Again, the water pressure should not exceed 40 to 60 PSI (personal preference) (80 PSI MAX) at any time-



What is the TET air pressure?

Click to expand...

The tet pressure was 60

Trying to post the images

do you have a pressure reducing valve installed