Designed specifically for the marine environment with run dry premium impeller technology. The SHURflo macerator flexible impeller also features a high-quality motor with new seamless shell, splash-proof design, rear O-ring shaft seal and manual turn key. Its innovative blade design ensures easy pumping while the inlet port has both a 1.5" hose barb and 1.5" male thread to screw directly onto a tank flange. Key Features Has a 1' outlet barb Innovative blade design ensures problem-free pumping Nylon body, nitrile impeller and stainless wear plate Run dry capability Thermally ignition protected