Polaris Vac-Sweep 280 / 180 / 280 TankTrax Pressure Cleaner Turbine Cover w/ Elbow Polaris Vac-Sweep 280 / 180 / 280 TankTrax Pressure Cleaner Turbine Cover w/ Elbow (C110) The turbine cover w/ elbow is a replacement part made by Polaris. The same high-quality materials were used to manufacture the original factory part. Making this a genuine OEM product. This turbine cover was designed to be a part of the drive system. Its purpose is to be a protective cover for the turbine but also to provide the high-pressure water that comes from the booster pump. From there it transfers to the turbine which then sends power to the wheels. This gives the cleaner the ability to cover the entirety of the pool s surface as it cleans. This cover is white to match these cleaners and has an elbow placed on its top for a hose to be connected providing high-pressure water. This makes it easy to identify and even easier to replace when worn or damaged.