Description
The Caleffi 553549A Auto Filling Valve regulates and maintains consistent water pressure by automatically supplying fluid as needed. It features a 1/2 inch sweat inlet with a 1/2 inch NPT outlet, supports a maximum inlet pressure of 230 PSI, and operates up to 150F with an adjustable pressure range of 360 PSI and a preset value of 15 PSI within HVAC systems. Installed in boiler and hydronic heating systems, it connects to water inlet piping to stabilize system pressure. As part of the fluid control assembly, it ensures proper filling, prevents pressure drops, and supports reliable system operation.
