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Conbraco 4V-500-09 Cap & Float Repair Kit - 2" PVB

Conbraco 4V-500-09 Cap & Float Repair Kit - 2" PVB

Brand: Conbraco Industries
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$260.80
$195.60
SKU 4V-500-09

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Replacement cap and float (bonnet) assembly designed for Conbraco/Apollo 4V-500 series 2" Pressure Vacuum Breakers (PVB). This OEM-equivalent repair kit restores the air-inlet/venting function so the valve can properly admit air during low-pressure events and protect potable water from back-siphonage. Ideal for irrigation and plumbing technicians servicing legacy 4V-500 PVBs.

  • What it is: Cap and float assembly (air inlet/bonnet module) for 2" Conbraco 4V-500 series PVBs; typically sold as part number 4V-500-09.
  • Included: Cap screw and float—components required to restore proper venting operation.
  • Function: Restores air-inlet venting so the PVB can introduce air during pressure loss and prevent back-siphonage.
  • Compatibility: Fits Conbraco/Apollo 4V-500 series 2" pressure vacuum breakers and replacement/repair applications for legacy bronze-bodied PVBs.
  • Use case: Recommended for field repairs, annual inspections, and when an air inlet or float has failed or been damaged.
  • Benefits: Cost-effective alternative to full valve replacement; helps return the assembly to code-compliant operation and reduces downtime.

Technicians should follow standard backflow repair procedures and local plumbing codes when installing this kit. If you are replacing internal parts during routine service, inspect the valve body and other modules for wear or corrosion and replace additional repair kits as needed. For part confirmation, reference SKU 4V-500-09 and consult manufacturer repair documentation or the Conbraco/Apollo reference manual when available.

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Frequently Asked Questions

What valves is this repair kit compatible with?
This kit fits Conbraco/Apollo 4V-500 series 2" pressure vacuum breakers and replaces the cap/float air-inlet module.
How do I know when to replace the cap and float?
Replace the cap/float if the vent fails to admit air, the float is damaged, or during annual inspection when the module shows wear.
Does the kit include all parts needed for the repair?
Yes — this part (4V-500-09) includes the cap screw and float required to restore the air-inlet assembly.

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