Watts 887227 Second Check Rubber Kit 4 Inches

Product Description

The WATTS 887227 is a second check rubber repair kit designed for use in backflow preventer assemblies. This kit provides the elastomeric components needed to restore the second check valve seat and disc to proper working condition, maintaining the assembly's ability to prevent reverse flow in potable water and commercial piping systems. At 0.5 pounds, it is a compact service kit handled by licensed plumbers and backflow prevention technicians during scheduled maintenance or after failed test results. The kit is sized for 4-inch valve bodies and is a direct-fit replacement for worn or degraded rubber components.

This kit applies to 4-inch reduced pressure zone and double check backflow preventer assemblies in commercial, industrial, and municipal water service applications. It is used during annual test-and-repair cycles when the second check fails to hold or when rubber components show visible wear, swelling, or chemical degradation. Typical installations include building water service entries, irrigation mains, and fire suppression supply lines where backflow protection is required by code.

Key Features

• Provides rubber components for second check valve rebuild on 4-inch assemblies
• Compatible with 909, LF909, 4000CIV, and 5000CIV series backflow preventers
• Lightweight kit at 0.5 pounds for easy field carry
• Supports compliance with annual backflow preventer testing and repair requirements
• OEM-style replacement rubber restores check valve sealing performance

Compatibility

Designed for use with WATTS 909, LF909, 4000CIV, and 5000CIV series backflow preventer assemblies in the 4-inch valve size.

Installation Notes

Installation should be performed by a licensed plumber or certified backflow prevention assembly tester. Shut off the upstream and downstream isolation valves and relieve system pressure before disassembling the check module. Follow local plumbing code requirements, including IPC and applicable state backflow regulations, for testing the assembly after repair. Do not reinstall the cover until the rubber components are properly seated and the assembly passes a field test.

Technical Specifications

• Size: 4 inches
• Weight: 0.5 pounds
• Series Compatibility: 909, LF909, 4000CIV, 5000CIV
• Component Type: Second Check Rubber Kit

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 887227