Conbraco 40-004-A1 Repair Kit

The Conbraco 40-004-A1 Major Repair Kit is a comprehensive field-service solution engineered specifically for the maintenance and overhaul of 3/4" and 1" Conbraco 40-200 series Reduced Pressure Principle (RPZ) backflow preventers. This kit facilitates the restoration of the first check valve, second check valve, and the relief valve assembly to original factory specifications. When troubleshooting pressure drops or a discharging relief valve, utilizing this OEM-spec major kit ensures proper internal sealing and spring tension. Each component is fabricated from high-grade elastomers and corrosion-resistant alloys, critical for maintaining the hydraulic containment required in high-hazard potable water applications. Field technicians will find all necessary O-rings, seat discs, and diaphragms to mitigate backpressure and backsiphonage risks. Ensuring backflow device compliance is streamlined by replacing worn internal components during annual testing cycles.

Key Benefits for Technicians

• Direct Compatibility: Engineered specifically for Apollo 40-200-04 and 40-200-05 models, ensuring precise seat alignment.
• Comprehensive Contents: Includes all essential soft goods and internals required for a complete RPZ valve teardown.
• Reduced Downtime: Pre-packaged components eliminate the need for individual part sourcing during backflow preventer maintenance.
• Enhanced Sealing: High-performance elastomers provide superior resistance to thermal expansion and chemical degradation.

Common Technical Questions

Will this kit work for the 40-100 series Double Check valves?
No, the 40-004-A1 is a major repair kit specifically designed for the Reduced Pressure Principle (RPZ) 40-200 series. The relief valve components included in this kit are not utilized in Double Check assemblies.

What are the signs that the relief valve diaphragm needs replacement?
If you observe constant dripping or a steady discharge from the relief valve port despite the checks being clean, the relief valve diaphragm or seat disc is likely fouled or compromised, necessitating a full rebuild.

Does this kit include the check valve springs?
The major repair kit typically focuses on the sealing components and diaphragms. If the stainless steel springs show signs of fatigue or heavy calcification, they should be inspected and ordered as separate line items if necessary.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.