Eastman Thermal Expansion Tank Size:2 Gal (60022) Made from 22 gauge or

Made from 22 gauge or 28-gauge electrogalvanized steel

Aluminum castings

Satco's LED 15-watt

Mold resistant

Eastman Thermal Expansion Tank Size:2 Gal (60022) Made from 22 gauge orThe 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