An expansion tank is a necessity in your home. When the temperature in your hot water heater goes up, the water expands. Prior to the days when homes started using backflow preventers and check valves, this excess water would push the cold water back into the water main. Nowadays, however, the water remains in your plumbing system. The installation of an expansion tank prevents this expanded water from causing your hot water heater to malfunction from the increased pressure. When the heated water in your plumbing system expands, this excess water enters the expansion tank. When someone turns on a hot water faucet, hot water leaves the system and the expansion tank releases the extra water back into the water supply.
Expansion Tanks can be found at www.supplyhouse.com
