Watts 887221 First Check Rubber Kit 909 LF909 4 Inches

Product Description

The WATTS 887221 is a first check rubber repair kit designed for use with WATTS 909 and LF909 series reduced-pressure zone (RPZ) backflow preventers in 4-inch configurations. This kit supplies the rubber seating and sealing components needed to restore the first check assembly to proper working condition. Licensed plumbers and backflow prevention specialists rely on this type of kit during scheduled maintenance or after a failed annual test. Keeping the first check valve seated and sealed correctly is essential for maintaining the backflow preventer's ability to protect potable water supplies from contamination.

This kit is used in commercial and industrial plumbing systems where 4-inch WATTS 909 or LF909 backflow preventers are installed. Typical applications include irrigation systems, fire suppression supply lines, and building water service entries where cross-connection control is required by local code. The rubber components in this kit address wear, compression set, and chemical degradation that occur over time in check valve assemblies operating under continuous line pressure.

Key Features

• Designed specifically for the first check assembly in 4-inch WATTS 909 and LF909 RPZ backflow preventers
• Rubber construction provides a reliable seal against backflow and back-siphonage
• Supports compliance with annual backflow preventer testing and maintenance requirements
• Lightweight at 0.7 pounds for easy handling in the field

Compatibility

Compatible with WATTS 909 and LF909 reduced-pressure zone backflow preventers in the 4-inch size.

Installation Notes

Installation should be performed by a licensed plumber or certified backflow prevention specialist in accordance with local plumbing codes and the authority having jurisdiction. Shut off upstream and downstream isolation valves and relieve system pressure before disassembling the check valve module. Inspect all mating surfaces for debris or scoring before installing new rubber components. Follow the manufacturer's reassembly sequence and perform a field test after service to verify proper differential pressure relief operation.

Technical Specifications

• Size: 4 inches
• Material: Rubber
• Weight: 0.7 pounds
• Compatible Series: 909 / LF909
• Component: First Check Repair Kit

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 887221