This potable water expansion tank is used on gas, oil or electric, direct-fired, residential water heater and hot water storage tank applications to absorb the increased volume of water created by thermal expansion. It also maintains balanced pressure throughout the water supply system by keeping system pressure below the temperature and pressure relief valve setting. This field-adjustable steel tank is air pre-charged at 20 psi, volume 2.1 gal, designed with an FDA approved polypropylene liner and butyl rubber diaphragm, copper-lined steel and 3/4 in male inlet connection. An expansion membrane prevents air-to-water contact in the tank ensuring a long system life.

• Lead-free
• Air pre-charge at 20 psi
• Prevents over-pressure caused by thermal expansion
• Butyl rubber diaphragm
• Used with most standard hot water heaters and storage tanks
• The potable water expansion tank shall be of drawn steel construction
• It separating the air chamber from the water containing chamber
• Inlet connector shall be stainless steel

Standards/Certifications: IAPMO listed, ANSI/NSF 61 certified

Applications: For used on gas, oil, or electric, direct-fired, residential water heater and hot water storage tank applications

• Specification Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS21883_Spec.pdf