Whisper-quiet and clog free. All the space and water-saving advantages of recirculation - with none of the disadvantages - It's a 100% self-contained sanitation system which requires no water pressure connection or holding tank installation - Operated by a simple 12-Volt DC hook-up - Unique dual filtration system puts an end to unpleasant clogging - Exclusive filter cone assures that only filtered fluid is delivered to the recirculating pump - Prismatic Level Indicator shows correct charge level and when to evacuate the toilet - Patented Slide-EZ Valve design assures leakproof performance. Dimensions: 18-11/16" to top of seat, 19-13/16" high overall, 17" wide, 20-1/4" deep.