Caleffi 553549A Filling Valve

The Filling Valve from the Caleffi 553549A line provides automatic, pre-adjustable filling for boiler and hydronic systems. The Caleffi 553549A Filling Valve combines a brass body with a durable PA 66 GF 30 cover for long-lasting performance.

Designed for a 1/2 inch nominal size installation, this valve uses soldered union x female threaded union end connections and measures 4-3/4 inches from end to end. It is rated for temperatures up to 150°F and pressures up to 230 PSI, with a factory setting of 15 PSI and an adjustable range of 3–60 PSI. A built-in visual system pressure indicator aids quick monitoring, while the device complies with CSA standards for North American use.

• 1/2" nominal size; End connections: soldered union x female threaded union
• Brass body with NBR seal and PA 66 GF 30 cover
• Automatic, pre-adjustable filling with factory setting 15 PSI
• Pressure setting range 3–60 PSI; gauge scale 0–60 PSI
• Temperature rating 150°F; pressure rating 230 PSI
• End-to-end distance 4-3/4 inches; CSA standard compliant
• Visual system pressure indicator for easy monitoring