Polaris® 9-100-1200 White In-Line Back-Up Valve for Polaris® Pool CleanerPolaris 9 100 1200 In Line Back Up Valve is a genuine factory replacement part designed to maintain the performance of Polaris Vac Sweep 360 pressure side pool cleaners. This high quality back up valve automatically activates to help the pool cleaner navigate efficiently and avoid getting stuck in corners. Made with durable materials, it ensures long lasting operation, reducing the need for frequent replacements. Installation is quick and