SPX Flow Johnson Livewell Aerator Pump - Straight Port Compact Johnson Cartridge pumps have a smaller profile to fit in more confined spaces. These Johnson Cartridge Livewell Aerator Pumps feature internal anti-airlock feature to ensure an even flow of water to livewell. This fully submersible 12 volt pump is easy to install and clean. Features Quick release motor cartridge 316 Stainless steel shaft Tough thermoplastic housing Crack-resistant dura port fittings Extended life water-cooled motor G