Watts 888117 Second Check Valve 1 Inch 919 Backflow

Product Description

The WATTS 888117 is a second check valve assembly designed as a replacement component for the WATTS 919 series reduced pressure zone (RPZ) backflow preventer. This internal check valve maintains the pressure differential required for proper backflow protection, ensuring that downstream water cannot reverse flow into the potable supply line. At 1 inch in size, it fits the corresponding 919 series valve body and is installed by licensed plumbers or backflow prevention specialists performing routine maintenance or component replacement on existing assemblies.

This check valve assembly is used in commercial and residential plumbing systems where backflow prevention is required by code. The 919 series RPZ preventer is commonly installed on irrigation systems, boiler feeds, fire suppression supply lines, and other cross-connection control applications. Replacement of internal check components is a standard part of annual backflow preventer testing and maintenance cycles performed by certified backflow testers.

Key Features

• OEM-style second check valve replacement for the 919 series RPZ backflow preventer
• 1 inch size matches the corresponding 919 body for direct fitment
• Designed to restore proper differential pressure performance in the valve assembly
• Lightweight component at 0.4 pounds, suited for field carry during service calls

Compatibility

Designed as a replacement second check valve for the WATTS 919 series reduced pressure zone backflow preventer in the 1 inch valve size.

Installation Notes

Installation should be performed by a licensed plumber or certified backflow preventer tester in accordance with local plumbing codes and cross-connection control program requirements. Shut off the upstream isolation valve and relieve system pressure before disassembling the backflow preventer body. After installing the replacement check valve, reassemble per the manufacturer service instructions and perform a differential pressure test to verify proper operation before returning the assembly to service.

Technical Specifications

• Valve Size: 1 inch
• Compatible Series: 919
• Component Type: Second Check Valve Assembly
• Weight: 0.4 pounds
• UPC: 98268073263

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 888117