Lancaster X99 Waste Water Pumps are designed for gravity feed pumping applications. They will remove clean or waste water from a laundry tray/tub/sink and will pump waste water to an overhead or remote drain line. No need to break through the floor for unsanitary sumps and sump pumps. Great for applications like laundry tray, wet bar sink, lavatory sink, air conditioning, condensate dehumidifier, water removal and more.