Pentek DGD-5005-20 Big Blue Compatible Replacement Water Filters by KleenWater, 4 Pack (5 Micron) Dirt, rust and sediment meltblown water filter cartridge Compatible with Pentek DGD-5005-20, 3M Aqua-Pure AP810-2, Liquatec SDF-45-2005 and Watts Flow-Pro FPMB-BB5-20 Plastic end caps and gaskets on each end provide water tight seal Up to 40 gallon per minute flow rate