NOZALL™ PUMPOUT ADAPTER
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-fulled 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.
Fitting:1-7/8" ID
Adaptor:1-1/2"
TPI = Thread Per Inch, 16.0"