Your 21 cu. ft. side-by-side refrigerator model No. WRS321SDHV01 uses Everydrop Filter 1-EDR1RXD1 water filter
Your refrigerator's water should stay consistently clean — not lose quality over time. The Whirlpool refrigerator WRS321SDHV01 water filter replacement, built around the genuine EveryDrop Filter 1 (EDR1RXD1), helps maintain that balance with every use. It works to reduce chlorine taste, lead, heavy metals, and other impurities that can quietly affect how your water tastes, smells, and looks — keeping both water and ice quality stable day after day.
Backed by NSF/ANSI certification, it supports dependable contaminant reduction you can rely on. The simple twist-and-lock design installs securely in under a minute without tools, eliminating internal leaks. Replace every 6 months or 200 gallons to maintain steady water flow and peak performance. Follow our replacement guide to stay on schedule and get the most from every cartridge. A quick 2-gallon flush after installation clears the line and delivers clean, great-tasting water from the first pour.
Most refrigerator water filters are designed to last approximately 6 months or filter up to 200 gallons of water — whichever comes first.
Modern LG, Samsung, Whirlpool, and Frigidaire refrigerators have built-in filter indicators that notify you when it's time for a replacement.
A drop in water pressure, an unusual taste, or an off smell from your dispenser are clear signs your filter is overdue for a change.