. When is it be We recommend every 6 months or sooner, depending on how a great deal you 're using the water from your refrigerator. . What certification does it by The NSF/ANSI 42 standards for the reduction of chlorine, tastes, and odors while retaining animated minerals salutary to ripe health. . For Amana / Maytag · UKF8001AXX, UKF8001AXX-750, UKF8001 ,8001 P, UKF8001AXXP, UKF9001, UKF9001AXX, WF50, OWF50, WF51, OWF51, WF50-N1300., WF50-KNI300, WF50-NI500, OWF50-WI500, WF50-WI500, WF50-KWI500 ,67002269,67002671, 67003523, 67003526, 67003527,67003528,67003591,67003727,67006474,67006637,12589201,12589203,12589206,12589208,12589210,480181700573,4902821 KitchenAid · 4396395,8171032,8171249 Sears / Kenmore · 46-9005,469005.9005,9005 P, 46-9006,469006,9006, 9006P, 46-9992,469992.9992,9992 P, 469005750,469005-750,46-9005-750 ? . What 's in the The WD-UKF8001 filter * 1 The instruction * 1 > ? . By the We provided multi packs to meet your incompatible needs. We on quality and service, if you have any question please contact us without hesitate. THE `` ADD TO CART '' BUTTON NOW AND MAKE A DIFFERENCE IN YOUR WATER ! . START DRINKING, eager TASTING WATER WITH WATERDROP TODAY ! .