Browse a variety of water stop valves at F.W. Webb. These fixtures are used to successfully control the water flow in your plumbing fixtures; they work by simply moving the stopper inside up or down. Water stop valves are normally located where the plumbing pipe enters a room, typically behind the toilet or under a sink. This makes them easily accessible when you need to turn your water on or off. Explore straight and angle stop valves from top brands Brasscraft, McGuire, and Jaclo, and find options in the right materials, sizes, and finishes for your plumbing needs.