This EDR4RXD1 replacement water filter for whirlpool refrigerator is comprehensively certified by the NSF, WQA, and IAPMO against NSF standards 401, 53, 42 & 372 test from each component to the filter cartridge as a whole to achieve a supreme filtration performance. This filter has been strictly tested by NSF 401 to reduce phenytoin, ibuprofen, naproxen, estrone and bisphenol A. Asides it has also been certified against NSF 53 standards to reduce lead, benzene and mercury in water. | [Exceptional fit] Our replacement for Whirlpool refrigerator water filter 4 combines precision measurement technology to perfectly reproduce the original scale parameters. We strive to provide perfectly fitting refrigerator filters with impeccable engineering designs, unlike inferior replacement filters that often cause water leakage issues. Don’t worry about the installation. Waterdrop saves you the time and hassle by offering tool-free, mess-free refrigerator filter replacements. | [Intense filtration] Waterdrop refrigerator filters reduce a wide range of harmful substances in water including chlorine, heavy metals, lead, mercury, odor, THM, VOCs, particles, cadmium, chromium, copper, and any other major impurities tested by independent laboratory to reduce these substances. The filter also works to retain many of the beneficial minerals that are essential in keeping our bodies running properly. | [Premium filter material] Instead of using charcoal containing coal, wood, walnut shell, and apricot shell, Waterdrop adopts 100% selected coconut shell carbon block from Sri Lanka that contains a surface area that is twice as large, with more micropores than inferior carbon block. With a detail-oriented thought we selected BPA-free and food-grade filter housing that passed NSF 372 certification for lead-free filtration. | [Fresh taste] The 100% natural coconut shell carbon block absorbs more impurities than low-priced and mixed carbon block. Waterdrop’s refrigerator filter significantly improves the taste of drinking water to provide the best water filtration experience possible. | [Replacement reminder stickers] Expired replacement filters might cause an accumulation of pollutants and a lower level of filtration performance. Therefore, Waterdrop includes a complimentary set of monthly install stickers to remind you of your filter’s lifespan. The filter life is 6 months or 300 gallons (varies based on the water condition). | [Responsibility] Each product, even small components manufactured by Waterdrop, must pass extremely high examination standards to reach the top requirement on the market. This does not end when a product leaves our factory: Our 24/7 customer service team will provide water purification solutions and help you answer your questions at any time. | [Water is life, treat it right] We believe everyone has the right to consume pure water, no matter where they are. We are not only about our business; we prioritize using our technology to help people. A portion of every purchase made is donated to deliver clean, pure water to children in water-scarce regions in Africa. | [Compatibility] Whirlpool & Maytag UKF8001, Amana UKF8001, UKF8001P, EveryDrop Filter 4, EDR4XD1, EDR4RXD2, 4396395, UKF8001AXX-750, UKF8001AXX-200, UKF8001AXX, UKF9001, Sears or Kenmore 9006, 9992, 9005, 9084, Bosch BORPLFTR20, PUR, Viking RWFFR, 67006475, WF295, Puriclean II. Waterdrop is an independent brand. | [Other compatible models] HDX FMM-2, 8171249, KBFS25ETSS01, Aqua Fresh WF295, Crystala Filters CF5, EcoBlueLife EBL7770, RWF0900A, Mist CWMF004, MORE Pure Filters MPF15090, OnePurify RFC0900A, Pure Line PL-400, Pure Green PG-8001, Tier1 RWF1040, HDX FMM-2, Clear Choice CLCH101, Swift Green SGF-M9, SGF-M10, Filterlogic FL-RF07, AQUA CREST AQF-UKF8001, Waterspecialist WS607B, Maxblue MB-UKF8001.