Watts 887908 Rubber Repair Kit 8 in 709 LF709 909

Product Description

The WATTS 887908 is a rubber repair kit designed for servicing and rebuilding reduced-pressure zone and double-check backflow preventer assemblies. Commonly referenced as a CK Rubber Kit, this kit provides the elastomeric components needed to restore internal sealing surfaces during routine maintenance or after inspection failure. It is compatible with 8-inch valve bodies in the 709, LF709, 2000CIV, and 909 valve families. Licensed plumbers and backflow assembly testers perform this type of repair as part of annual certification and testing programs.

This kit is intended for 8-inch backflow preventer assemblies installed in commercial, industrial, and municipal water supply systems where cross-connection control is required. The repair components support in-field rebuilding of check valve seats and seals, reducing the need for full assembly replacement. Typical installations are found in mechanical rooms, vault enclosures, and above-grade backflow installations serving fire suppression, irrigation, and domestic water service lines.

Key Features

• Rubber sealing components sized for 8-inch valve bodies
• Compatible with 709, LF709, 2000CIV, and 909 Watts valve families
• Supports in-field rebuild without full assembly replacement
• Lightweight kit at 1.05 pounds for easy transport to job site

Compatibility

Designed for use with WATTS 709, LF709, 2000CIV, and 909 series backflow preventer assemblies in 8-inch configuration.

Installation Notes

Installation should be performed by a licensed plumber or certified backflow assembly tester in accordance with local plumbing codes and IPC guidelines. Shut off upstream water supply and depressurize the assembly fully before disassembly. Inspect all seats and internal cavities for debris or corrosion before installing new rubber components. After reassembly, perform a full differential pressure test to verify the device passes local test requirements before returning to service.

Technical Specifications

• Valve Compatibility: 709, LF709, 2000CIV, 909
• Size: 8 inches
• Weight: 1.05 pounds
• UPC: 98268399622

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 887908