928-073

This heavy-duty hydronic expansion tank is engineered for use in closed-loop heating systems to manage thermal expansion. As water is heated within a boiler system, its volume increases; this diaphragm-style tank provides a dedicated space for that expansion, effectively maintaining consistent system pressure. By absorbing excess pressure, it protects your plumbing and boiler components from stress and prevents the frequent tripping of the pressure relief valve. Featuring a durable steel construction and a rugged butyl diaphragm, this tank ensures the air cushion remains separated from the system water, preventing waterlogging and ensuring long-term, maintenance-free operation in residential or light commercial heating applications.
Type: Hydronic Boiler Expansion Tank
Size: 4.5 Gallon Capacity
Dimensions: 11 inches × 11 inches × 15.5 inches
Application: Used in closed-loop hydronic heating and cooling systems, including residential boilers, baseboard heating, and radiant floor systems to control thermal expansion.
Specifications: Maximum working pressure: 75 psi; Factory pre-charge: 12 psi; Maximum operating temperature: 240°F (115°C); Connection size: 1/2 inch NPT; Diaphragm material: Butyl rubber.