Key Compatibility Notes: Compatible with 1/2-inch for Sta- valves WC112-148/A and WC112-147. Not compatible with 2-inch pipes. Please verify your valve model before purchasing to avoid sizing issues. Versatile Performance: Replace worn or parts with this one-piece plug and cap assembly, designed to support six key valve functions-backwash, recirculation, freeze protection, waste, filter, and flush. Leak-Proof Performance: This assembly includes a gasket and O-ring to prevent water leaks and air infiltration. Safety of Use: Made of high-quality material, it's to breaking or fading, suitable for outdoor use, and reduces the need for frequent replacement. Easy Installation: The plug and cap assembly aligns with the original screw holes for installation. Screws are not included; please retain the old screws. No Modifications Required: Simply remove the old component and secure the one. It can be installed in under five minutes, reducing downtime of your pool filtration system. Color: As Shown Material: plastic Package Contents: 1 * Plug and Cover Assembly Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.