The Shurflo Piranha Ballast Pump Cartridge is found on most Malibu Boats & Axis Wake Research Boats and most models. We carry both the 800 GPH and the 1100 GPH pump. You can also purchase the ballast pump or cartridge separately, which works for both types of pumps (800 GPH and 1100 GPH). If the ballast pump seems to have an electrical issue you can usually fix these issues by just replacing the cartridge. Find out more about the cartridge here: