Caleffi 573017A 573 COMBO AutoFill Backflow Preventer & Fill Valve 1/2" Press Inlet x NPT Outlet with Pressure Gauge, ASSE 1012

Roll over image to zoom in Click on image to zoom

Caleffi 573017A 573 COMBO AutoFill Backflow Preventer & Fill Valve 1/2" Press Inlet x NPT Outlet with Pressure Gauge, ASSE 1012

Name: Caleffi 573017A 573 COMBO AutoFill Backflow Preventer & Fill Valve 1/2" Press Inlet x NPT Outlet with Pressure Gauge, ASSE 1012
Brand: Caleffi
SKU: CALE-573017A
Price: 249.99 USD
Availability: InStock

CaleffiSKU: CALE-573017A

Price:

$249.99

Stock:

Re-stocking soon

Quantity:

Special order — typically ships in 1–3 weeks.
Contact us for an exact lead time.

Questions? Call (404) 678-9908 or chat with us.

Need 10+ or a project quote? Request a quote · Pros: open a trade account

Free shipping on orders $99+ · 30-day returns · Manufacturer warranty

Shipping details

Shipping weight: 5.0 lb
Box size: 11.7 × 6.6 × 2.7 in

Connection Type	MIP
Size	1/2"
Type	AutoFill

The Caleffi 573017A 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 press inlet x NPT outlet 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" press inlet x NPT outlet connections and your required fill pressure; check the installation manual for the adjustment range. Allow for drainage from the backflow vent port.