The EDR4RXD1 replacement water filter for whirlpool refrigerator, despite its affordable price, offers the best – a mix of prior filtration performance and important certifications from the well-known regulatory body in the industry – NSF 42 and NSF 372 certificates. Thanks to the 100% Sri Lankan superior coconut shell carbon block, this replacement for Maytag water filter UKF8001 is effective against various contaminants.【Advanced filtration process】This replacement for Whirlpool refrigerator water filter 4 effectively filters off contaminants from your water. These include heavy metals, chlorine, copper, VOCs, and other suspended particles tested by the third-party laboratory. While the impurities are reduced, every beneficial mineral in your water is kept, ensuring that your body functions properly.【Perfect fit】This Waterdrop UKF8001 refrigerator filter replacement is made from an advanced industrial automation system and a precision measurement technology that ensures that you get the same fit as the original. Moreover, you need no tool to install this refrigerator water filter. Just follow the installation guidelines we have provided, and you will be done in minutes.【Top-notch filter material】 Here, you are getting a significant improvement to the less-efficient charcoal filter that relies on coal, wood, walnut shell, and apricot shell to filter water. The filter material in this filter is a 100% Sri Lankan selected coconut shell carbon block, with 2x larger surface area and more micropores.【Great-tasting water】Another essential benefit of the 100% natural coconut shell carbon block is the enhanced adsorption capability. Unlike the cheap and mixed carbon block, the filter material in the Waterdrop refrigerator filter improves the overall taste of your water.【Complimentary month install stickers】 You do not have to go the extra mile to monitor your refrigerator filter’s lifespan. This Waterdrop refrigerator filter is shipped with complimentary month install stickers that help track the service life at all times. Now you know when you have exhausted the 300 gallons or 6 months of pure water, depending on the water conditions.【BPA-free and food-grade materials】 At Waterdrop, we prioritize your safety. This is why we have used only safe materials in this refrigerator filter, as verified by the NSF 372 certification for lead-free materials.