Tsunami Bilge Pump T500. Part Num: 4606-7. With their innovative engineering and compact design, Tsunami pumps deliver high output from a small package. We use the advanced material available, including the best quality bearings and state-of-the-art brushes, alloys and magnets. Our patented shaft seal prevents leaks caused by misalignment and out caulked and tinned wiring eliminates wicking, prevents water damage and resists corrosion. Boaters, boat-builders and dealers all want one thing from their bilge pumps - more power. And that is what the Tsunami Series delivers. with high-capacity, high-efficiency output. Tsunami Cartridge pumps have replaceable / interchangeable motor cores. Makes servicing simple and quick.