Darlly Cartridge [4-3/16" OD Top x 4-3/16" OD Bottom x 5-5/8" dia x 18-3/4" L] (PP1644) airinjectors and internal components are all

and internal components are all showing wear

or replacement projects where matching the original part number and installation details is important

mounting locations

connector repair

Darlly Cartridge [4-3/16" OD Top x 4-3/16" OD Bottom x 5-5/8" dia x 18-3/4" L] (PP1644) airinjectors and internal components are allThe Darlly PP1644 filter cartridge is designed for compatible filtration applications and features 4 3 16 inch top and bottom openings, a 5 5 8 inch diameter, and an 18 3 4 inch length. Even without square footage noted in the product title, this cartridge is clearly a dimension driven replacement intended for systems that rely on these exact measurements. Some filter replacements are chosen less by broad capacity labels and more by the physical fit