An have efficient pumping action. Easy for guests to operate. Time proven design. Quality construction. Self-priming pump. Equipped with special air vent to reduce back pressure when inlet valve is closed. Designed for the marine environment and busy boater. Vitreous standard china bowl. Base and housing are injection molded white thermoplastic. Features Buna N rubber “O” rings and “U” cap seals. Measures 14-1/2" H x 16-1/2" D x 17-1/2" W. The hand toilet has easy to operate lever handle. The electric toilet uses pushbutton operation and comes with lever handle for conversion to manual operation during power loss. Push button not included. PHEII motor assembly is made of high quality corrosion resistant materials and the gearbox is lubrication and maintenance free.