Not affiliated, but picked one of these up for sucking up liquid and hand watering. It can pump liquid out or suck it up. Works great for cleaning the trays. First plug the drain, add water, scrub the trays and then suck up all the nasty crap its this. I upgraded it with a quick connect 3/8" valve on the line. The unit holds about 2 gallons and has an auto shutoff. Very well made with parts available.