Description
The Zilmet ZS12 Stainless Steel Expansion Tank 3/4″ NPT 3.2 Gal is a pressure control component designed to absorb thermal expansion and stabilize system pressure in HVAC systems.This tank has a 3.2-gallon capacity with a 3/4-inch NPT connection, a factory pre-charge of approximately 36 psi, and a maximum operating pressure of up to 150 psi, with a working temperature range of about 14°F to 210°F. It is installed in hydronic heating, chilled water, or domestic hot water systems, where it accommodates fluid expansion and maintains stable pressure. As part of the system, it helps protect components, reduce stress on piping, and support consistent operation.
