Marine Air's Seawater pumps are heavy-duty centrifugal pumps and provide a steady flow of cooling water through the air conditioning system. The glass- reinforced polypropylene head pumps have magnetic drive impellers, and are available with submersible or air-cooled motors. Larger pumps have bronze heads with mechanical seals, and air-cooled, drip-proofs motors. A wide range of pumps and motors are available for use in different power environments. Centrifugal pumps must be mounted below the water line. Self-priming pumps are also available for above-water-line applications. A scoop type through-hull and a seawater strainer are recommended for proper operation.