What is an expansion tank?

An expansion tank is a crucial component in a closed-loop hot water heating system. Its main function is to absorb excess pressure and provide a buffer for the expansion of water in the system as it heats up.

Expansion tanks are typically installed near the boiler or water heater and are connected to the system through a pipe. They are usually made of steel or other durable materials that can withstand high temperatures and pressures.

There are two main types of expansion tanks: diaphragm and bladder tanks. Diaphragm tanks have a flexible membrane that separates the water from the air, while bladder tanks have an inflatable bladder that performs the same function. Both types work by allowing the water to expand into the tank as it heats up, preventing pressure buildup in the system.

Regular maintenance of an expansion tank is important to ensure that it functions properly and extends the life of the heating system. This can include checking the pressure levels, inspecting for leaks, and replacing the tank if necessary.

Overall, expansion tanks play a vital role in maintaining the efficiency and safety of a hot water heating system by preventing damage caused by excessive pressure and temperature fluctuations.