Caleffi 574151A 574 COMBO AutoFill RPZ Backflow Preventer & Fill Valve 3/4" NPT with Pressure Gauge, ASSE 1013, Low Lead

The Caleffi 574151A COMBO AutoFill combines an ASSE 1013 reduced pressure zone (RPZ) backflow preventer and an automatic fill valve in one 3/4" NPT low lead brass body with a pressure gauge. It fills and maintains pressure in closed hydronic systems where a higher level of backflow protection is required.

RPZ protection is typically required where the heating system water is treated with chemicals such as glycol antifreeze or corrosion inhibitors. Combining the RPZ and the fill valve in one unit reduces the space and the number of connections on the boiler make-up line.

Before ordering, confirm the 3/4" NPT connections and your local code requirements for RPZ devices, including testing and the need for a drain at the relief port. Check the installation manual for the fill pressure adjustment range.

Specifications

• Brand: Caleffi
• Manufacturer Part #: 574151A
• Series: 574 COMBO AutoFill
• Type: RPZ Backflow Preventer and Automatic Fill Valve Combination
• Size: 3/4"
• Connection: 3/4" NPT threaded
• Max Temperature: 140F
• Max Pressure: 140 psi
• Material: Low lead brass
• Includes: Pressure Gauge
• Standards: ASSE 1013
• UPC: 8016615576399
• Category: System Fill Tanks & Autofills

Documents

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

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