Whirlpool / KitchenAid Quarter-Turn Base Grille Filter Comparison

The Deluxe (4396508) and Ultimate (4396510) are interchangeable, so you can use either filter in your fridge.

As you can see from the chart, the Ultimate filter removes more contaminants from your water.

For example, the Ultimate filter removes 99.99% of all cysts from your water, while the Deluxe filter removes none.

Contaminant	Deluxe 4396508	Ultimate 4396510
Cysts	---	99.99%
Atrazine	---	85.6%
2,4-D	---	93.06%
Asbestos	---	99.93%
Turbidity	---	99.3%
Particulates	95.1%	99.9%
Chlorine	99.0%	97.6%
Lead at pH 6.5	99.35%	99.35%
Lead at pH 8.5	99.31%	99.31%
Mercury at pH 6.5	96.22%	96.7%
Mercury at pH 8.5	91.57%	91.2%
Benzene	96.4%	96.3%
P-Dichlorobenzene	99.77%	99.7%
Toxaphene	92.86%	92.96%

Both filters leave beneficial Fluoride in the water