The one that came with your T@B should get you by, but I up-grated to a 15' hose to reach my own clean-out when I park it in my back yard. I bought a water-tight plastic box at the storage store to put the smelly thing in and I strap it to the the bottom of the rack on the back.
TV:2019 Nissan Frontier PRO-4X With an Old Man Emu lift
Trailer: 2019 T@B 320 Boondock with a Lock&Roll Coupler & Jack-e-up