ZEP-1 Stainless Steel Thermal Expansion Tank

ZEP-1 was designed to provide maximum protection to the heat exchanger and the 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; this helps prevent potentially costly leaks and repairs.

ZEP-1 can be installed below the isolation kit or anywhere on the cold water supply line between the heater and the check valve.

Tank has a 50 PSI factory precharge

Air charge can be adjusted, and is serviceable

Entire tank is constructed of 304 stainless steel

1/2" NPTM 304 stainless steel connection

UV resistant and approved for outdoor installation

Butyl membrane diaphragm

NSF61 Certified