The Johnson Bilge pump series consists of four different sizes. The basic version can be combined with either an automatic switch AS888, an electronic float switch or the new ULTIMA switch for automatic operation. The L450 has an improved design with easy-to-install Dura-Port discharge ports to eliminate stress cracking caused by over-tightened hose clamps. The pumps will be delivered including both a straight and a 90° smooth elbow Dura-Port as well as a removable check valve. The Cartridge pumps may be manually operated via the bilge control panel.