Wide Compatibility: Compatible with ULTRAWF, Pure Source Ultra, 1000472026, 203618461, 242017800, 242017801, 242017802, 242069601, 3957684, Kenmore 46-9919 46-9999, 469999, 9919, 9999, A0094E28261. Long-lasting Performance: For optimal performance of your filtration system, it is advised to drain around 4 gallons of water before the initial use.
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