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- Cat-Pig Swamp
Looked it up, I've never seen one, I've seen bladder tanks on water pumps for well water, but those are to maintain pressure when the pump is not running. No idea how they could keep pressure down on a public water system. But if it works it works, hope you didn't get any damage from the leak.It’s a small tank (ours is 2 gal) that is installed on the water intake line, which prevents pressure surges in the system. If you are on a municipal water system the water pressure in the system can fluctuate usually higher at night.
"The Eastman 2-gallon thermal expansion tank is designed to prevent dangerous build-ups of pressure in your water heater tank. The thermal expansion tank stops hot water from backflowing into the cold water line while preventing hot water from escaping through the pressure relief valve and onto the floor. This constant fluctuations in water pressure can be dangerous and they can damage your water heater tank permanently, properly installing a thermal expansion tank can solve all these issues. Recommended for homes with a closed-loop water supply system This product comes with a 6-year limited warranty and is factory pre-charged at 40 psi. Complies with NSF-61 and Lead Free law. UPC approved."