Polaris Zodiac 180/280/360/380/3900 Swivel [Black] (D21) mazzei A properly selected O-ring helps

A properly selected O-ring helps support cleaner closure and contributes to more dependable tank sealing performance during normal operation

Confirm using part number 640-8240V

That correct fit and function are what make the final replacement feel dependable and application-correct

Always verify fixture compatibility

Polaris Zodiac 180/280/360/380/3900 Swivel [Black] (D21) mazzei A properly selected O-ring helpsThis black swivel helps reduce hose twisting on compatible Polaris 180 through 3900 cleaner systems. Swivels are important connection points that allow the hose to rotate more freely as the cleaner moves around the pool. A worn or restricted swivel can contribute to hose tangling, poor cleaner movement, and reduced coverage. Replacing it helps maintain smoother hose behavior and supports consistent cleaner travel during each cleaning cycle. Black