JG Speedfit Service Valve is a push-fit fitting for the connection of plastic and copper pipe. The valve allows for the flow of water to be stopped by a ¼ turn of a screw in case of an emergency or repair. It is suitable for use with hot and cold water systems only. It is simple to install with no tools required and can easily be removed without causing any damage to the pipe work or fitting. The service valve won't cause a build up of scale that could degrade a water system.