Product review (5 stars): Waterdrop is best UKF8001 OEM filter replacement
Waterdrop:  Awesome OEM water filter replacements for our Whirlpool/ Maytag UKF8001 series: 750 gallon rated capacity!!  Excellent priced performer ( x 3) with great tasting water and ice (Thanks to Hetch Hetchy Reservoir too).  Very cost effective and has been our family's go to over the past few years.  Can't even find these on the shelves at either Lowe's or Home Depot.
"THANK$!!"  We're restocked through till the Holidays next year.