The rehau 249576 is a high quality precision engineered 12 inch brass water stop connector which its mainly used for securing accessories to the outlet at the end of the hose when a spray nozzle or an accessory is disconnected from the connector an integral valve automatically shuts off the water supply so that you can attach other watering items without get soaked through this rehau water stop connector is easy to connect with a screw action that will cling to the pipe to create a water tight s