Residential 30psi Boiler Relief Valve drips in summmer, Why?

jrh_2

Residential 30 psi. Hot Water Boiler Relief Valve drips in summer. Drips about .25 gal in 24 hours. Why? I have replaced relief valve twice in two days. Continues to drip. What could I do or check to stop this problem.

John@Reliable_10

Why?

Water psi set to high. But most likely reason is a waterlogged compression tank or a under pressurized x-tank. Last in could be a bad (leaking) tankless coil if one is on system. If this doesn’t make sense to you please call a pro

Jerry_15

Can't improve on that call. Straight to the point.

Dale

pressure

I would add to the other suggestions a bad manual fill valve, very common for an old valve to leak through a bit. If you enjoy plumbing I would change the old valve.

CHARLES_4

Relief valve

And to think no one thought to ask what the static pressure was in the boiler...

Dave Stroman

Sometimes relief valves just leak. If there is nothing causing too high of pressure, just replace it.

Dave in Denver

Weezbo

it is doing that because,...

it wants attention. *~/:) thats the truth .

terry_5

Drain expansion tank completely,

Jerry_15

I've never had much luck re-charging ex tanks. I usually just replace them. Same with blow offs. Once they go they often won't reseat even if the pressure is right. A test gauge on a hose bibb in the system saves a lot of conjecture. Good luck