Furnace Expansion Tank Leaking

Over time it becomes logged with water or air starts to leak out of the tank and when this happens the pressure relief valve will start to leak.

Furnace expansion tank leaking.

Leaks tend to travel down with gravity if you see evidence of a leak above the tank then it s likely at the top of that evidence not the bottom. The furnace relief valve from the boiler or plugging it so that it does not leak is a very bad idea this can allow the. The expansion tanks for boilers are used as a compartment to. The boiler expansion tank is a vital part of your boiler system.

The expansion tank is a pressurized system. It says hxt 30 12 psi precharge 5 gallon. The expansion tank is the same size as the one that was there bout the size of a propane tank maybe just a tad smaller. This part allows water in the boiler to expand.

The boiler expansion tank absorbs the expanding water by allowing the air in the expansion tank to compress this prevents the pressure. The changes in pressure inside the expansion tank can bring about the degradation of the water heating system and cause leaks. Steel expansion tanks and bladder expansion tanks. Even in the best boiler system your expansion tank may begin to experience some leaks.

Boiler expansion tank problems can greatly affect your hot water system. I never had any problems with overflow leaking with the old tank for 5 years. The expansion tank is water logged. I can t tell from the photo if it s on the heating system or on the home water supply.

The old tank is a gray tank. The changes in pressure due to overflow from the boiler during water expansion as well as having moving parts makes for the potential for degradation of the system. Before even considering expansion tank replacement if the water leak you are describing is not at an air charge vent on the expansion tank itself a part that is indeed not present on most bladder type expansion tanks for heating systems then you are probably talking not about a problem with the expansion tank but rather a problem with an automatic air bleeder vent a separate.