The Hayward Perflex flex tube nest is designed for compatible EC65 DE filter applications where the internal filtration assembly needs replacement. A flex tube nest is useful because it forms the core filtration surface for DE media, supporting fine-particle removal and helping maintain cleaner water.This replacement is especially useful when the original tube nest is torn, damaged, worn, or clogged beyond cleaning. Replacing the internal assembly can help restore more dependable filtration performance and extend the usefulness of the existing filter housing.The ECX1251 is a practical service part when a compatible Hayward Perflex EC65 filter needs a tube nest to restore dependable filtration performance. Hayward Perflex EC65 flex tube nest Designed for compatible DE filter applications Helps restore internal filtration support Useful when the original tube nest is damaged or worn Supports cleaner and more dependable filter performance