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I had the same question but since my husband is an ex-fireman he had the solution.
Carry the tube to the sink; put the pump back on "drain". Starting with the tube raise it up above your head and the water will run out of the tubing into the sink. When that part is empty let it go towards the floor as you raise up the next section. Try and coil the emptied part up on the floor rather than just letting it land haphazardly - it'll be a little easier to put away.