Angle Stop vs Shut Off Valves. Angle stop valves are specialized fixtures typically installed under sinks, toilets, and other water outlets to control water flow to specific areas. They are named for their 90-degree angle to the pipe, which not only makes them easy to operate with a simple quarter-turn but also provides a clear visual of the water flow direction. These valves are designed for daily use, offering convenience and ease of access. Shut off valves, on the other hand, serve a broader purpose within a plumbing system. They are installed at key points, such as at the main water line entering a home or business, to control the water supply to the entire system. Shut off valves are crucial for emergency situations, allowing for the quick cessation of water flow to prevent damage. They are less frequently used on a daily basis compared to angle stop valves but are essential for overall system management and safety. In summary, while both angle stop valves and shut off valves are integral to a plumbing system, they differ in their application and frequency of use. Angle stops are more user-friendly for daily operations, whereas shut off valves are critical for system-wide control and emergency situations. https://www.taishenghy.com/news/industry-news/what-is-the-difference-between-an-angle-valve-and-a-stop-valve.html