The Pentek DGD-7525 is the correct replacement cartridge for the following water filter housings:
The Pentek DGD-7525 Big Blue Gradient Water Filter is an all-in-one pre- and post- filter that eliminates the need for step-down filtration systems in your hojme. This Pentek water features an outer layer with a 75 micron pre-filter that captures larger sediment and a 25 micron inner-layer that effectively traps finer particles. The pure polypropylene construction of this 25 micron water filter results in a water filter cartridge that's resistant to chemicals and corrosion.
Pentek DGD-7525 Big Blue Gradient Water Filter specifications:
This replacement water filter cartridge fits is also known by the following name brands: American Plumber, Ametek, Bruner, Culligan, Kleen Plus, Pentek, Plymouth, and US Filter. This replacement cartridge can be used as a replacement for the Whirlpool WHKF-GD25BB.