Caleffi 573012A 573 COMBO AutoFill Backflow Preventer & Fill Valve 1/2" NPT x NPT with Pressure Gauge, ASSE 1012

The Caleffi 573012A COMBO AutoFill combines an ASSE 1012 backflow preventer and an automatic fill (pressure reducing) valve in one 1/2" body with a pressure gauge, with NPT x NPT threaded connections. It fills and maintains pressure in a closed hydronic heating system.

Installed on the cold water make-up line to a boiler, the fill valve keeps the system at its set fill pressure while the dual check backflow section with atmospheric vent protects the potable supply. Combining both functions in one compact unit saves space and connections compared with separate devices.

Before ordering, confirm the 1/2" NPT x NPT threaded connections and your required fill pressure; check the installation manual for the adjustment range. Allow for drainage from the backflow vent port.

Specifications

• Brand: Caleffi
• Manufacturer Part #: 573012A
• Series: 573 COMBO AutoFill
• Type: Backflow Preventer and Automatic Fill Valve Combination
• Size: 1/2"
• Connection: NPT x NPT threaded
• Max Temperature: 150F
• Max Pressure: 175 psi
• Material: Brass
• Includes: Pressure Gauge
• Standards: ASSE 1012
• UPC: 8016615504958
• Category: System Fill Tanks & Autofills

Documents

• Technical Data Sheet (PDF)
• Installation & Operation Manual (PDF)
• Submittal Sheet (PDF)
• Product Brochure (PDF)

See also: system fill tanks & autofills, all Caleffi products.