Refrigerator water filters are one of the easiest ways to improve drinking water quality at home, but the market is split between OEM (original equipment manufacturer) filters and aftermarket alternatives, with significant price and performance differences.
Most fridge filters use activated carbon to reduce chlorine, sediment, taste and odor. NSF/ANSI 42 certified filters meet aesthetic standards for these basics. Higher-tier filters certified to NSF/ANSI 53 also reduce health-related contaminants like lead, mercury, and certain pesticides. The actual performance varies significantly by brand and model — read the certification details, not just the marketing copy.
Look for the filter model number (not the fridge model number) printed directly on the existing filter cartridge. It will be something like EDR1RXD1, EDR3RXD1, MWF, or W10295370A. Searching that exact number will return both OEM and aftermarket options. If you can't find the printed code, check your fridge's manual or the manufacturer's website with your fridge's model number to look up compatible filters.
Most refrigerator filters are rated for 6 months or 200-300 gallons, whichever comes first. Many fridges have an indicator light that doesn't actually measure water quality — it's just a 6-month timer. If your household uses a lot of filtered water (large family, ice maker running constantly), you may need to replace more frequently. If you barely use the water dispenser, the indicator light will still go on at 6 months even though the filter has plenty of life left.
Reduced flow at the dispenser, water that tastes "off" or smells like chlorine again, slower ice production, or visible discoloration of the new filter compared to a fresh one are all signs to replace regardless of timeline. Old filters can also become bacterial growth sites if left in too long, which defeats their purpose.
Keep your fridge water and ice clean without overpaying.
Refrigerator manufacturers charge $40-60 for OEM filters that cost a few dollars to make. Aftermarket filters work identically for half the price—but only buy NSF-certified options from reputable brands.
Our top aftermarket pick. Waterdrop makes filters for virtually every refrigerator brand. Proper certifications, good quality, and significant savings over OEM.
Find Your Filter →Another reliable aftermarket option. Filters for Samsung, LG, GE, Whirlpool, and more. Good reviews and proper certifications.
Find Your Filter →Replace your refrigerator filter every 6 months or 200-300 gallons—whichever comes first. Signs you need a new filter: