SPX Flow - Johnson Pump Cartridge Livewell Aerator PumpCompact Johnson Pump Cartridge pumps have a smaller profile to fit in more confined spaces. These Johnson Cartridge Livewell 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. The Johnson Pump Cartridge Livewell Pump is a direct replacement for Mayfair Cartridge Livewell Pumps and is compatible with Mayfair Replacement Cartridge Motors.Features: Quick release motor cartridge; 316 Stainless steel shaft; Tough thermoplastic housing; Crack-resistant dura port fittings; Extended life water-cooled motor; Glass resin composite impeller; Ignition Protected; Saltwater tough; 100% factory tested with three year warranty; Specifications: 3/4" OD discharge port; 3/4" Straight thread NPS; Fuse Size: 5A; Available in 500 GPH and 750 GPH capacities; Part #38503 supersedes part #38502