Pentek GAC-20BB Carbon Filter Cartridge, 20" x 4-1/2" by Pentek

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Granular Activated Carbon (GAC) Replacement Cartridge, 20" x 4.5"

Pentair Pentek DGD-5005-20 Big Blue Water Filter, 20-Inch Whole House Sediment Filter Cartridge Replacement, Dual-Gradient Density Spun Polypropylene, 20" x 4.5", 5 Micron, Pack of 1, White

Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack)