Tsunami Bilge Pump T500. * Part #: 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.