For connecting washing machine or dishwasher drain hoses to siphons built into the wall. The drain hose can be attached to the wall connection. The conical drain hose connection is suitable for hoses with a diameter of 20 mm, 23 mm, and 3/4 inch. Thread identification/nominal width is 1 inch (DN: 25) with a measurement of 33.7 mm. It includes one hose clamp that fits 20 - 32 mm hoses. The seal ensures protection against leaking water. Consumer information: only suitable for wall-mounted siphons with a round cover plate without a cleaning opening.