7-position valve for versatile pool management. The Waterway WVS003B Top Mount Multiport Valve offers seven functions, including filter, backwash, rinse, waste, recirculate, closed, and winterize, providing flexibility to efficiently manage your pool’s filtration system. Easy installation with split-nut design. Featuring a split-nut design, this valve allows for quick and easy installation, simplifying maintenance for Waterway sand filters like the Carefree, Clearwater, and TWM series. 1.5-inch internal threaded ports. Equipped with 1.5-inch plumbing ports with internal threads, the valve ensures broad compatibility with various pool systems, making it a versatile replacement part. Durable ABS body for long-lasting use. Built with a durable ABS body, the valve is designed to withstand heavy use and the demands of pool filtration, ensuring smooth, reliable operation over time. Ideal for Waterway sand filters. Specifically designed for Waterway models, this multiport valve is a dependable solution for maintaining optimal filtration performance in your pool.