The Waterway WVD001 side mount multiport valve is designed for compatible filter applications using 2 inch female pipe thread connections and includes unions. A side-mount multiport valve is especially useful because it provides a central control point for filter operation modes while the included unions can simplify installation and future service.The female threaded connection style makes this Waterway valve a practical fit for systems built around threaded plumbing rather than slip fittings. Replacing the valve with a complete unit that includes unions can help make the repair cleaner and more service-friendly.For compatible filter system service, this Waterway multiport valve is a practical replacement when a side-mount design, 2 inch female threaded connections, and included unions are the desired combination. Waterway side mount multiport valve 2 inch female pipe thread connection Includes unions Useful for compatible filter operating-mode control Supports cleaner installation and easier future service