When we visit our friends we used their toilet to dump the waste tank/poop tank/RV waste from the motorhome and we used Flexzilla Garden Hose, 3/4 in. x 50 ft. Heavy duty and Lightweight.
The hose will be attached to a marine-made 12V Quick Release RV Mount Macerator Waste Water Pump 45 LPM 12 GPM Boat RV Marine price $66, to grind up the waste material.
You can order at Amazon.com
Simple and Easy
Happy RVing Folks!!