The Dometic 3″ FPT Holding Tank Adapter / Clean out is used to install a level indicator or a cleanout in various holding tanks. Features: Includes 3 Inch Inspection Port, O-Ring, Gasket, and Stainless Hardware Threaded Port Accepts the Threaded Cap of TankWatch Level Indicator System Stainless hardware Tank Adapter Instructions Part numbers Dometic Legacy: Without Cap: 307230272 With Cap: 307238685
