For an economical alternative consider the Whirlpool UltraEase WHKF-R-PLUS Compatible Filter.
The Whirlpool WHKF-R-PLUS is the correct replacement filter cartridge for the following filtration systems:
The Whirlpool UltraEase WHKF-R-PLUS Replacement Filter is the replacement water filter cartridge for the Whirlpool WHCF-IMTOS and WHCF-IMPLUS Inline Filtration Systems. The WHKF-R-PLUS is a geniune Whirlpool water filter replacement, also known as the WHKFR Plus, WHCFR-Plus, 56932, W10185590, and Whirlpool Ultra-Ease Replacement Filter. The Ultra Eaase WHKF-R-PLUS is NSF/ANSI Certified to reduce chlorine taste & odor, sand, soil, rust, and sediment in drinking water and ice.
Whirlpool UltraEase WHKF-R-PLUS Replacement Filter specifications:
The WHCF-R-Plus has recently gone through a part number change and packaging update. The new part number is WHKF-R-PLUS. These two part numbers represent the exact same filter. Filter change instructions are included on the box. This filter should be changed every 6 months based on water quality and usage.