Watts 888581 First Check Valve 995 Series

Product Description

The WATTS 888581 is a first check valve belonging to the 995 series, designed for use in backflow prevention assemblies in plumbing and water distribution systems. It serves as the upstream check valve in a reduced-pressure or double-check backflow preventer, holding pressure to protect potable water supplies from contamination. Sized for 0.5 to 0.75 inch line connections, this replacement check valve is installed by licensed plumbers and backflow prevention specialists during assembly service or repair. At 0.4 pounds, it is a compact, lightweight component suited for both residential and light commercial applications.

The 888581 fits 995 series backflow preventer assemblies in the 0.5 inch to 0.75 inch size range. It is a direct service replacement used when the existing first check valve fails seat inspection or shows signs of fouling, wear, or leakage during annual backflow testing. Typical installations include domestic water service entries, irrigation supply lines, and commercial plumbing systems where cross-connection control is required by local code.

Key Features

• Fits 995 series backflow preventer assemblies in 0.5 to 0.75 inch sizes
• Functions as the first (upstream) check valve in the assembly for reliable backflow protection
• Lightweight construction at 0.4 pounds for easy handling during field service
• Direct OEM-style replacement to restore assembly to proper working condition
• Supports annual backflow test and repair workflows without full assembly replacement

Compatibility

Designed as an OEM-style replacement first check valve for WATTS 995 series backflow preventer assemblies in the 0.5 inch to 0.75 inch size range.

Installation Notes

Installation and replacement of backflow preventer check valves should be performed by a licensed plumber or certified backflow prevention tester in accordance with local plumbing codes and IPC requirements. Shut off the upstream isolation valve and relieve system pressure before disassembling the backflow preventer body. Inspect seals and seats during service and replace all worn components before reassembly. After installation, the assembly must be tested and documented by a certified backflow tester per local authority requirements.

Technical Specifications

• Series: 995
• Connection Size: 0.5 to 0.75 inches
• Component Type: First Check Valve
• Weight: 0.4 pounds
• UPC: 98268869927

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 888581