The first manual marine toilet to utilize pressurized fresh water. Eliminates calcium deposits in discharge hose. No thru hulls necessary when installed with a holding tank. Diaphragm type pump and telescopic handle. Low water use. Built in backflow prevention includes a vacuum break. Lock out feature prevents backflow coming though the discharge when not in use. Footprint is a direct replacement for competetive models. Available in 2 sizes: Marine Size: 13"H x 17 3/4"W x 17 1/4"D Household Size: 13 1/8"H x 18 1/4"W x 20"D