Eastman Thermal Expansion Tank Size:4.5 Gal (60023) Fits standard 1/2" socket drive

Fits standard 1/2" socket drive

Part No: D-099B

Built-In Charging Cradle

Green lawns and blooming flower beds require the right amount of water

Provides excellent durability

Eastman Thermal Expansion Tank Size:4.5 Gal (60023) Fits standard 1/2" socket driveThe Eastman thermal expansion tank is designed to prevent dangerous build ups of pressure in your water heater tank. These thermal expansion tanks are available in 2 and 4. 5 gallon sizes. The Eastman 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, addressing the constant fluctuations in water pressure that can be dangerous