Hayward DE3620 Pro Grid Assembly (DEX3600DC) waterfall this Waterway round weir is this Waterway round weir is a practical replacement when the original white skimmer door needs to be renewed The Val Pak generic Jandy CV Series BM pressure gauge and air relief assembly is designed for compatible filter applications where the top side monitoring and air management components need replacement as a unit The Hayward Pro Grid assembly is designed for compatible DE3620 DE filter applications where the internal grid assembly needs replacement The DEX3600DC is a practical service part when a compatible Hayward DE3620 filter needs a Pro Grid assembly to restore dependable filtration