This compact shower sump system is designed to meet the higher demands from todays boating industry where more equipment is used. Features the fresh water system onboard and involves showers, dishwashing machines, galley sinks, etc. The shower sump turns on/off automatically using our Ultima switch technology and has multiple inlet ports for handling waste water from more than one tapping point. The check valve on the outlet stops water from flowing back into the tank. The tank has a tight-fitting lid to minimize splashing and odors. To further aid in cleaning, the system Features an easily removable mesh filter.• Pump Flow Rate: 844 Gallon Per Hour• Voltage Rating: 12 Volt• Dimensions: 11.42 Inch Length X 8.26 Inch Width X 5.7 Inch Height• Discharge Hose Diameter: 3/4 Inch• With Pump: Yes Check Valve On Outlet Stops Water From Flowing Back Into The Tank Features The Cartridge 1000 Gallons Per Hour Bilge Pump & Ultima Switch For Automatic Operation & A Mesh Filter For Easy Cleaning | Johnson Pump Marine Grey Water Sump