Conbraco 4A-500 Freeze Resistant PVB Backflow Preventer 3/4 in. FPT | CDC4A-504-A2F

• Size: 3/4 in.
• Connection: Female Pipe Thread
• Max Working Pressure: 150 PSI

Features & Benefits

The Apollo ½ Pressure Vacuum Breakers prevent contamination of the potable water supply due to back-siphonage. An integral freeze protection relief valve serves to reduce the possibility of damage due to intermittent freezing conditions.

The modular check valve cartridge provides a captured spring, a replaceable seat and a reversal silicone seat disc. This Made in America assembly features Apollo ½ ball valves with stainless steel handles and nuts as standard and carries the five-year Apollo ½ factory warranty.

• Low pressure loss documented by independent approval agencies
• Built-in freeze resistance feature standard
• Easily removable modular check valve cartridge
• Captured stainless steel springs
• Apollo ½ ball valves w/ SS handles & nuts standard
• Test cocks located for easy draining
• Corrosion resistant
• No special tools required
• Unique canopy detachment
• Designed, cast, machined, assembled and tested IN THE USA
• Conbraco Industries, Inc. continues to operate as Apollo Valves

Product Details

Approvals – Standards

• ASSE 1020 – (1/2″ ½ 2″)
• CSA B.64.1.2 – (1/2″ ½ 2″)

Performance Rating

• Maximum Operating Pressure 150 psi
• Temperature Range 33 ½ F ½ 140 ½F

Material Specifications

• Part Name: Material
• Body, Ball Valves, Test Cocks: Bronze C84400 or C89836
• Canopy:UV-Resistant ABS
• Bonnet:Glass-Filled PPO
• Check Valve Cartridge:Glass-Filled PPO
• Springs:Stainless Steel
• Seat Discs:Chloramine-resistant Silicone
• Float:Glass-Filled Polypropylene
• O-rings:Chloramine-resistant EPDM

To winterize the valve:

1. Secure the water source at a location that will not freeze.
2. Open #1 and #2 test cocks to drain the PVB.
3. Place the inlet and outlet isolation ball valves in the halfway open/shut position.
4. If possible, blow the lines clear with pressurized air.

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