Will make emptying your holding tank as clean, easy and fast as making a trip to the gas station.. Provides airtight seal: Cone-shaped design matches exactly with the cone shape of black rubber nozzles found at most pumpout stations.. Clean and efficient: Eliminates need for messy water source to create sufficient vacuum to empty holding tank contents.. Made of heavy-duty, glass-filled nylon.. Simple to use: Just screw NozAll adapter into your waste deck fitting.. Works with both rubber nozzle type and cam-operated type of suction hose fittings.