â—Why do you choose it Waterdrop’s NSF-certified WF401 replacement refrigerator water filter provides you and your loved ones cleaner, healthier, and better-tasting drinking water at home. By reducing contaminants like lead, sediment, cysts, cryptosporidium, turbidity, and giardia, as well as by decreasing the chlorine taste and odor in ice and water, the WF401 is a safe and affordable way to contribute to a healthy lifestyle. â—When is it be replaced We recommend every 6 months or sooner, depending on how much you're using the water from your refrigerator. â—What certification does it tested by The NSF/ANSI 42 standards for the reduction of chlorine, tastes, and odors while retaining vital minerals beneficial to good health. We are proud members of the Water Quality Association. â—Replacement For Amana ·WF30, WF40, WF401, WF401P, WF401S, WF401T ·12527304,12527301,12527302,12527303,12527305, 12527307,12527308,12527309,12388401,12388402,12388403,12388404,12388405,12388406,12388407 12388409,12388410,12319801,67003634,12589203,12589206,12527504, R0130021, R0130022 Kenmore/ Sears E46-9014,469014,9014, 9014P, 46-9904,469904,9904,9904P, 04609904000,04609014000 â—What’s in the box The WD-WF401 filter*1 The instruction*1 â—By the manufacturer We provided multi packs to meet your different needs. We focus on quality and service, if you have any question please contact us without hesitate.