The Hayward Pro-Grid assembly is designed for compatible DE2420 DE filter applications where the internal grid assembly needs replacement. A grid assembly is useful because it provides the internal filtration structure that holds DE media and helps trap fine debris for cleaner water.This replacement is especially useful when the original grid assembly is torn, damaged, clogged beyond cleaning, or no longer filtering effectively. Replacing the assembly can help restore dependable DE filtration performance without replacing the full filter tank.The DEX2420DC is a practical service part when a compatible Hayward DE2420 filter needs a Pro-Grid assembly to restore dependable filtration. Hayward DE2420 Pro-Grid assembly Designed for compatible DE filter applications Helps restore internal DE filtration support Useful when the original grid assembly is damaged or worn Supports cleaner and more dependable filter performance