Don't Buy WaterSentinel WSF-4
Bought this knock off water filter for our refrigerator. Two-pack for half the price. Kathy says it didn't work like the original filter.
So don't buy WaterSentinel. Instead get WF1CB PureSource Refrigerator Water Filter.
Even if I don't need a filter?
If you don't buy filters for your refrigerator, ignore this. This is really a note to future me (and anyone else googling for WSF-4 or WF1CB.)