The Whirlpool Refrigerator Ice & Water Filter 8171413 fits Whirlpool refrigerators with a round plastic filter situated vertically, inside the refrigerator compartment.
The 8171413 Filter replaces these older filter part numbers:
8171413R, 2204324, 2204326, 2206039, 2206048, WFI-NL200, NL200
It is also a suitable replacement for the 8171414.
Refrigerator manufacturers recommend that fridge filters be replaced every 6 months or when the "change filter" light comes on.