Flexcon Thermal Expansion Tank 0.52 gal (2 Liter) 3/4 MNPT - Box of 12

Thermal expansion tanks are designed for residential water heater and hot water storage tank systems to manage the increased water volume caused by thermal expansion. By maintaining consistent pressure throughout the water supply system, these tanks help protect against over-pressure conditions and extend the life of the system. A durable internal membrane separates air and water, ensuring reliable performance over time.