I go to state parks with a 25 gallon gray tank, macerator pump, and 7 gallon aquatainer. I pump the gray into the back of our sub, and dump it via the camper's slinky at the dump station. I have 40ft of transparent 1 1/2 inch hose. Its a ***** to drain that water out of the hose, and do not dump black via the macerator while camping. At home I use a 50ft 3/4 hose for black dumping into my septic.
My camper is 25ft long, and the 40ft is perfect. The problem occurs once you kill the flojet, you have 40ft of stinky water stuck in the hose. Remove hose from flojet, elevate and try to get that water into the gray tank.
