Originally Posted by Earl0523
My toilet has a hand pump on the side with a dry and wet bowl lever.
You have a manual toilet.
To empty the holding tank remove waste cap, thread in 1.5 inch adapter, attach pump out hose, turn on pump out station. There is a clear section on the hose when no more water can be seen turn off the pump out disconnect everything and reinstall waste cap.
To use toilet open seacock in engine compartment, set selector to wet, pump handle until there is water in the bowl. Do your thing. Pump handle until all waste is gone, set selector to dry, and pump again until bowl is empty.