Johnson Pump Aqua O2 Twin Port Aerator Pump Johnson Pump cartridge aerator pumps offer ease of convenience and years of reliable service. This pump has an improved design with an easy-to-changereplace motor cartridge. Features All Aqua O2 Cartridge Aerator Pumps offer the convenience of using only one intake for both the livewell and washdown pump Includes a 34 NPT seacock inlet High-flow impeller design Quick-change motor connection 360-degree pump discharge rotation Switchless automatic bilge