Push the hose onto the outlet, drop the other end in the sink.
Fit the drain hose to your machine and run the other end to the sink.
Three lengths exist. A 1M Drain Hose ships in the box with Clean. Two further lengths are sold separately: "0.5 m if the machine sits near the sink, so you are not stuffing coiled up excess hose into or near your sink. 1.5 m if you need to reach a plug that is nowhere near the sink." All lengths are the same premium, flexible material.