Water Heater Thermal Expansion Tank

With a properly installed tank the system pressure will be maintained and will help prevent added stress to various components saving you headaches and money down the road.

Water heater thermal expansion tank.

The tank has two sections that are separated by a rubber valve. The excess water volume instead of causing too much pressure on the plumbing rushes into the expansion tank and lowers the pressure in the water heater to safer levels. The sizing chart will allow you to choose the correct size expansion tank for your application. Water expands by roughly 2 as it heats up from 50 f to 120 f.

Expansion tanks when water is heated it expands due to a phenomenon known as thermal expansion. The expansion tank serves as a backup system to prevent overworking your plumbing. A thermal expansion tank is designed to help protect potable drinkable hot water systems helping to maintain them and keep them working efficiently. Common residential expansion tank looks like a small propane tank.

New or larger expansion tanks may be needed due to pressure reducing valves check valves and backflow preventers added to the community s water system. This ultimately protects it from damage. When your water thermally expands a water heater expansion tank prevents unwanted increases in pressure. What is a thermal expansion tank like.

Usually they are the same size as basketball depending more or less on the size of the water heater they serve. A water heater expansion tank is another small tank that is attached to the water supply pipe of the water heater. The thermal expansion tank is certified to nsf ansi 61 dhot 140 f and pressures to 150 psi. Since water expands when it is heated due to thermal expansion the water heater creates extra water volume every time it heats water.

The expansion tank is designed to handle the thermal expansion of water as it heats up in the water heater preventing excessive water pressure. We offer a range of expansion tanks for potable and non potable applications. Expansion tanks are designed to safely absorb the excess water created and prevent relief valves from triggering. At the top it has an air valve like the one seen on most tires called schrader.

You install the expansion tank down the line from the inlet valve that sends hot water into your home. This water heater expansion tank stops hot water from backflowing into the cold water line and prevents hot water from escaping through the pressure relief valve and onto the floor. Constant fluctuations in water pressure can be dangerous and they can damage the water heater properly installing a thermal expansion tank can solve all these issues. The water heater expansion tank serves as an overflow receptacle by absorbing excess water volume that occurs when water is heated as well as absorbing fluctuations in the incoming water supply pressure.

They are used to absorb excess water pressure which can be caused by thermal expansion as water is heated. Water heater thermal expansion tanks. At the bottom there is a threaded pipe connection.