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Your cart is empty.A Thermal Expansion Tank can be added to your hot water tank at any time. It does not need to be done when your are replacing an old tank. But if you are replacing a water heater, you should add a thermal expansion tank! A Thermal Expansion Tank for use on storage tank hot water heaters is typically a small carbon steel tank - usually either 2.1 gallons or 4.5 gallons. They are lined with a rubber membrane to help protect the tank from corrosion. They are designed to be installed on the cold water line. The ZEP5 can be installed vertically or horizontally (as long as it is fully supported independently from the piping). The ZEP5 is a 2.1 gallon tank and is perfect for use with hot water tanks from 40 - 50 gallons. The set point for this type of tank is 150°F. The ZEP5 comes with a factory pre-charge of 40 psi. This may need to be adjusted depending on the water pressure in your home. Brass plumbing fittings are recommended for installation as they will tend to last longer. The thermal expansion tank is typically installed on the cold water line.
