Watts 887229 Second Check Rubber Kit 8 Inches

Product Description

The WATTS 887229 is a second check rubber repair kit designed for use in reduced pressure zone (RPZ) and double check valve backflow prevention assemblies. This kit provides the elastomeric sealing components needed to restore proper check valve function during scheduled maintenance or after a failed inspection. Licensed plumbers and fire protection contractors rely on this type of kit to return backflow preventers to service without replacing the entire assembly. At 8 inches, this kit is sized for large-diameter commercial and industrial installations where maintaining water supply integrity is required by code.

This repair kit is intended for use in commercial, industrial, and municipal water systems where large-bore backflow preventers are installed. It is commonly used during annual testable backflow preventer maintenance, after a failed third-party inspection, or as part of a preventive maintenance schedule. The 8-inch size makes it appropriate for high-flow service lines, fire suppression supply connections, and similar large-diameter applications.

Key Features

• Rubber sealing components restore second check function in supported backflow preventer assemblies
• Sized at 8 inches for large-diameter valve applications
• Compatible with 909, LF909, 4000CIV, and 5000CIV series assemblies
• Supports field repair without full assembly replacement
• OEM-style fitment for consistent sealing performance

Compatibility

Designed for use with WATTS 909, LF909, 4000CIV, and 5000CIV series backflow preventer assemblies in the 8-inch size.

Installation Notes

Installation should be performed by a licensed plumber or certified backflow prevention tester. Shut off the upstream water supply and relieve pressure from the assembly before disassembly. Follow the assembly manufacturer's service instructions for proper component orientation and seating. After reassembly, the backflow preventer must be tested and documented in accordance with local authority having jurisdiction (AHJ) requirements before returning to service.

Technical Specifications

• Size: 8 inches
• Weight: 1.95 pounds

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 887229