Laundry/Mud room is right off my garage, separated by an exterior(metal) door. Utility sink which is connected to the water softener, is right inside the door from garage to the laundry/mud room. Looking for a way to be able to feed the hose through the interior door once I connect it to the utility sink, so I can wash my car with softened water with my power washer. Needs to be able to "close" and not just look like a hole in the door when not in use. I don't want to just leave the door open because of all the bugs and also let any A/C out. Last time I took the deadbolt off and ran the hose through the hole. Any ideas?