Zilmet ZHT18-30 4.8 Gal Capacity Cal Pro ZHT18-30 Hydronic Expansion Tank, 1/2 in Connection, NPT Connection, Carbon Steel

The Zilmet ZHT18-30 Cal Pro Expansion Tank supports hydronic heating systems with a 4.8-gallon capacity and 1/2" NPT connection. Crafted from high-grade carbon steel, it provides consistent pressure regulation and system protection for residential or light commercial setups.

• 4.8-gallon capacity hydronic expansion tank suitable for mid-sized systems
• 4.8-gallon capacity with a 3/4" NPT connection, suitable for systems ranging from 50,000 to 150,000 BTU output.
• Constructed with a carbon steel shell and SBR synthetic rubber diaphragm.
• Maximum operating pressure of 150 PSI and temperature up to 210