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The Filters Fastr FFDG-10BB-25 dual gradient water filter is the correct replacement for the Pentek DGD-7525.
The Pentek DGD-7525 Big Blue Dual Gradient Density Filter works as a pre and post filter all in one eliminating the need for dual step-down filtration systems in your home.
The Pentek GD-7520-20BB 20″ Big Blue Filter Cartridge is part of the new GD and GDA Series of cartridges made from 100% pure polypropylene manufactured in the U.S.A.
