White Water Inlet Integrated Fill Dish Hatch Lock for RV Trailer Camper, A10631. Durable and reliable. 2. The 1 2 inch vent on the hatch ensures that water can be added quickly. 3. Plastic water inlet, the hatch is equipped with a lock and key. 4. Gravity plastic water inlet, threaded and tower type interface, the air outlet can quickly add water. 5. Replace the key lock. If you feel the key is troublesome, you can replace it with a plastic knob lock. 6. Vent: 1 2 inch, Connector: Back of 1 2 inch male connector, 1 1 4 inch