Your 21 cu. ft. side-by-side refrigerator model No. WRS321SDHV uses Everydrop Filter 1-EDR1RXD1 water filter
Your refrigerator's water should stay consistent — not lose quality over time. The Whirlpool refrigerator WRS321SDHV water filter replacement, built around the trusted EveryDrop Filter 1 (EDR1RXD1), helps maintain that balance. It works to reduce chlorine taste, heavy metals like lead and mercury, and other unwanted substances that can quietly affect how your water tastes, smells, and looks. The result is cleaner water and clearer ice you can rely on every day.
Backed by NSF/ANSI certification, it supports dependable filtration performance. This replacement installs smoothly with a twist-in fit that aligns properly and seals without leaks or tools. Replacing it every 6 months or every 200 gallons helps avoid buildup and keeps water flow steady and consistent. 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.