To remove the drainage kit, do the following (be sure that the water tank is empty):
Remove the drainage tube by turning the
connector bolt anticlockwise.
Remove the black external plastic bolt in
order to unplug the plastic drainage
connector from the support.
Next step is to disconnect the drainage
tube from the water tank. Just pull gently
the drainage tube that is connected to the
water tank discharge nozzle.
Finally, remove by pulling the little return
tube in water tank.