Zilmet ZEP1 Stainless Steel Thermal Expansion Tank for Tankless Water Heaters

The Zilmet ZEP1 is a compact 2-gallon stainless steel thermal expansion tank and shock arrester designed specifically for tankless and point-of-use water heaters with 2 gallons or less of total water volume. Most tankless water heater manufacturers require a thermal expansion tank when a backflow preventer is required, and the compact ZEP1 is the perfect solution for providing thermal expansion protection in tight places.

Key Features:

• Entire tank is constructed of 304 stainless steel with 1/2" NPTM 304 stainless steel connection
• 150 PSIG maximum working pressure with 50 PSIG factory precharge
• Maximum operating temperature of 140°F
• NSF 61 certified and IAPMO listed, UPC approved
• UV resistant and approved for outdoor installation
• Butyl membrane diaphragm
• Precharge can be adjusted to system pressure
• Compact dimensions: 3.2" diameter x 2.8" height

The ZEP1 provides maximum protection to the heat exchanger and piping system on tankless water heaters, relieving problems associated with excess pressure by absorbing any potential increase in pressure within the unit or piping system, helping prevent potentially costly leaks and repairs. It can be installed below the isolation kit or anywhere on the cold water supply line between the heater and the check valve.