A self-cutting isolation valve is extremely useful when an additional water supply is needed from existing pipework. The clamp is simply fixed around your pipework and the valve then screws in forming a connection in to the pipe. All this is done without the need to drain the system prior making it an excellent solution with the added bonus giving you individual control of the newly formed supply. This self-cutting valve enables the branching of live pipework with an incorporated isolation valve. Ideal for quick and reliable solutions rather than re-routing pipework. Quick and easy installation with self-cutting feature. Chrome plated brass construction. Compression fitting.