Thetford Titan 21 Gallon 2-Wheel Portable Waste Tank w/Ladder Hook [40953]Titan 21 Gallon 2 Wheel Portable Waste Tank with Ladder Hook 21 gal capacity portable waste tank with 2 wheels and ladder hook. Features: Lowest fill height in the industry to fit all RV heights Horizontal empty, no need to tip the tank on its end Pre attached Titan RV sewer hose with end cap Ready to use right out of the box Pre attached strap attaches to trailer hitch for easy transport to the station 2 rugged, heavy duty wheels Large washout port