Waste tank level indicator shows when holding tank is full. Exhaust valve for a smooth, even flow when emptying wastewater. 5.2 Gallon. Hold Down Bracket for 7-0010. High-density polyethylene construction is corrosion proof. No external connections required. High efficiency piston pump uses as little as 50ml to flush. Double seal valve eliminates leakage and odors. Quick emptying with easy-pour spout. Matte finish conceals scratches and is easy to clean. T-type flush nozzle improves flow circle while saving water.