Polaris 6-411-00 - Piston AssemblyThe Polaris 6 411 00 Piston Assembly is a genuine replacement internal component for select Polaris pressure side pool cleaners. It helps restore proper internal movement and water flow, keeping your cleaner operating efficiently. This piston assembly is a common wear item and should be replaced periodically as part of routine maintenance. Key Features Genuine Polaris replacement Complete piston assembly Fits Polaris cleaners