Caleffi 573009A Combination Fill Valve and Backflow Preventer

The Combination Fill Valve and Backflow Preventer is designed to protect your drinking water from backflow while maintaining proper fill for storage tanks and appliances. The Caleffi 573009A combines a dual-check backflow preventer with a dependable fill valve for a compact, reliable solution.

Designed for 1/2 inch nominal size with soldered union x female threaded end connections, this unit fits standard plumbing configurations. The compact body is brass with an EPDM seal, rated for up to 150°F and 175 PSI, making it suitable for most residential water systems.

Certified to CSA (Canada and US) and ASSE 1012 standards, it features a pressure setting range of 3 to 60 PSI with a factory setting of 15 PSI and a gauge scale from 0 to 60 PSI for easy monitoring.

• 1/2 in nominal size for versatile installation
• End connections: soldered union x female thread
• Brass body with EPDM seals for durability
• Pressure rating 175 PSI; temperature rating 150°F
• Compliance: CSA and ASSE 1012
• Adjustable pressure range 3–60 PSI (factory setting 15 PSI)