In a typical mini-split, the water flows to the outside unit and exits the system there, so you either have a pump or a sufficiently sloped pipe from the inside

In a typical mini-split, the water flows to the outside unit and exits the system there, so you either have a pump or a sufficiently sloped pipe from the inside unit to the outside unit. edit: I guess you could route the drain pipe anywhere if you wanted, so I retract my previous statement.