American Backflow 1/2-1" Major Internal - Repair

The American Backflow 40-500-02 Complete Internal Repair Kit is specifically designed for servicing 1/2", 3/4", and 1" Conbraco 40-500 Series Pressure Vacuum Breakers (PVBs). This full-service kit includes the check assembly, check spring, and float assembly—everything needed to restore the unit’s internal backflow prevention functions. Compatible with bronze-body PVB models manufactured between 1991 and 2003, this OEM-quality replacement kit is ideal for both annual testing compliance and long-term service maintenance of legacy irrigation or potable water systems.

Key Features:

• Complete internal kit for Conbraco 40-500 PVBs
• Fits 1/2", 3/4", and 1" valve sizes
• Restores key backflow prevention components
• Compatible with systems installed from 1991–2003
• Designed for use in potable water and irrigation systems

Construction & Durability:

• Durable float and spring assembly components
• Corrosion-resistant parts for underground and exposed installs
• OEM-level material standards ensure longevity

Performance & Functionality:

• Replaces worn internal check and float mechanisms
• Ensures system maintains backflow protection per code
• Reduces the need for full valve replacement

Ease of Installation & Use:

• Direct replacement kit—no modifications required
• Compatible with certified backflow testing protocols
• Streamlined servicing for licensed irrigation and plumbing professionals

Technical Specifications:

• Part Number: 40-500-02
• Catalog Number: COMP REPAIR KIT 1/2", 3/4", & 1"
• UPC: 670750573170
• Compatible Model: Conbraco 40-500 PVB
• Valve Sizes: 1/2", 3/4", 1"
• Kit Contents: Check Assembly, Check Spring, Float Assembly

Installation & Application:

• Designed for backflow prevention in irrigation and potable water lines
• For use during inspection, maintenance, or system rehabilitation
• Meets requirements for PVB repair in code-compliant installations