Zurn 18 l Lead-Free Potable Water Thermal Expansion Tank

The 4.8 gallon XT-18 Thermal Expansion Tank is utilized on potable water lines between the backflow preventer or pressure reducing valve and the water heater for protection against water thermal expansion in residential applications. As the system pressure increases, water enters the polypropylene-lined water chamber of the tank, expanding a diaphragm into a pre-charged air chamber to keep the system pressure below the relief valve setting. Materials include a carbon steel shell with an epoxy finished coating, and corrosion-resistant stainless steel connection with a polypropylene liner and Butyl rubber diaphragm.|Pre-charge is field adjustable for convenient maintenance|Carbon steel shell with polypropylene liner ensures long-lasting construction|Diaphragm style tank is ideal for thermal expansion protection in residential applications|Stainless steel connection resists corrosion|Low-lead law compliant|IAPMO Listed|Water Quality Association - Certified to NSF/ANSI 61 & 372|Water chamber is polypropylene lined|Diaphragm is made of butyl rubber|Easy to install