KEEP YOUR WATER CLEAN and protect your appliances by removing dirt, sand, silt and particulates. FITS ALL 20″ Big Blue or other heavy duty housings and can replace any 20″ x 4.5 sediment filter cartridge. ACHIEVES UP TO 3X the dirt holding capacity of similar size sediment cartridges. NSF CERTIFIED for your peace of mind. REPLACE EVERY 6 MONTHS or when you notice a drop in water pressure or quality. Pentair Pentek DGD-7525-20 Big Blue Sediment Water Filter, 20-Inch, Whole House Heavy Duty Dual-Gradient Density Spun Polypropylene Replacement Filter Cartridge, 20″ x 4.5″, 25 Micron is NSF CERTIFIED. Pentair Pentek DGD-7525-20 Big Blue Sediment Water Filter keeps your water clean and protect your appliances by removing dirt, sand, silt and particulates. Pentair Pentek DGD-7525-20 fits ALL 20″ Big Blue or other heavy duty housings and can replace any 20″ x 4.5 sediment filter cartridge. DGD-7525-20 Big Blue Sediment Water Filter can achieve up to 3X the dirt holding capacity of similar size sediment cartridges. Replace every 6 months or when you notice a drop in water pressure or quality. This item is in the category “Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters”. The seller is “bigtimeshoppingmall” and is located in this country: US. This item can be shipped to United States.