Description
The Zilmet ZFT18R-30 Flat Hydronic Expansion Tank Wall-Hung 1/2″ NPT 4.8 Gallon is a pressure control component used to absorb thermal expansion in closed-loop water units in HVAC systems. It works by using an internal diaphragm to separate air, and water, allowing excess pressure from heated water to expand into the tank and maintain stable system pressure. It’s hydronic heating systems, boilers, and radiant heating setups, and pressure balance is essential. It reduces system stress, improves safety, and elping ensure stable, and efficient operation in systems.









