Pressure Problem

Josh_10

One more thing that might be a possiblity... You could have ruptured the expansion tank bladder during installation by mistakenly overpressurizing or it may be undersized. Just a thought. I see both happen all the time even by professionals.

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Darryl_3

Pressure Problem

I have a hot water boiler that has five zones with pumps. One zone is for an indirect hot water heater. The radiation in the house is cast iron based board and cast iron radiators. I have replaced the relief valve, fill valve and expansion tank. Every now and then I find the relief valve on the boiler leaking and the pressure at 30psi. As a test I have closed the ball valve on the fill side. Still find that the pressure climbs. Any help/suggestions is appreciated.

Ron Schroeder

Darryl

I would say that unless your Pressure Reducing Valve and ball valve are bypassing than you have a leaking coil in the Hot Water Maker unless you have an old tankless coil still hooked up that could be leaking.

Bruce

Brad White_107

I agree with Bruce

99% chance it is within the two things mentioned, more likely the in-boiler coil especially in that you have replaced the expansion tank, relief and fill valves.

As an aside, see if there is a valve in the line to the expansion tank and make sure it is left open at all times. Also if an old gravity system with large pipes and lots of volume it may require a larger tank than you have. Just a thought.

A.J.

pressure problem

> I have a hot water boiler that has five zones

> with pumps. One zone is for an indirect hot water

> heater. The radiation in the house is cast iron

> based board and cast iron radiators. I have

> replaced the relief valve, fill valve and

> expansion tank. Every now and then I find the

> relief valve on the boiler leaking and the

> pressure at 30psi. As a test I have closed the

> ball valve on the fill side. Still find that the

> pressure climbs. Any help/suggestions is

> appreciated.



Just one more thing, if you are on city water check your pressure to make sure that your not above 70 lbs otherwise the plumbing could be forcing your feed valve to fill.

A.J.

pressure problem

Just one more thing, if you are on city water check your pressure to make sure that your not above 70 lbs otherwise the plumbing could be forcing your feed valve to fill.

clammy

check aquastat

I have on one or two occasions have seen the same promblem after checking that your feed water line inb completly closed run the boiler and check your aquastat setting i have seen a few which where bad and ran the bioler temp to over 200 causing the safety to pop ,also check as other have stated your indirect tanks domestic water lines isolate them and make sure they are not leaking into your boiler increasing your boilers pressure popping your safety peace and good luck clammy

Big Ed

Tank

What size expansion tank is on the job?Also what make and model indirect ?