Culligan D40 Level-4 Drinking Water Replacement Cartridge
Culligan D40 Level-4 Drinking Water Replacement Cartridge
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30-Day Hassle-Free Returns
30-Day Hassle-Free Returns
Not satisfied? Return your order within 30 days for a full refund or exchange — simple and easy.
✔ Easy return process
✔ Fast refunds
✔ No hidden conditions
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Fast U.S. Shipping
We ship within the United States only — no international delays.
✔ Processing time: 1–2 business days
✔ Delivery time: 3–7 business days
✔ Real-time tracking available
👉 Track your order anytime from the header via Track Order
About This
- Universal Compatibility for Easy Upgrades: Designed to fit Culligan under-sink water filtration systems US-550, US-600, US-560, and CTR-210. Slim, compact design makes replacement quick, clean, and tool-free for effortless filter changes.
- Premium Carbon Block Filtration Power: Activated carbon block technology helps reduce lead, mercury, turbidity, sediment, chloramine, and chlorine taste & odor—delivering crisp, clean, and refreshing water right from your kitchen faucet.
- Cleaner, Safer Water Every Day: Removes impurities that affect taste, smell, and clarity while supporting a healthier lifestyle for drinking, cooking, coffee, tea, and baby formula preparation.
- Long-Lasting Performance You Can Trust: Filters up to 600 gallons or lasts up to 6 months before replacement—offering dependable contaminant reduction and fresher water for months at a time.
- Eco-Friendly & Cost-Effective Solution: Skip expensive bottled water and reduce plastic waste. Enjoy fresh, great-tasting water on demand while extending the life of your under-sink filtration system.
Overview
- Material : Carbon
- Product Dimensions : 2.5"D x 2.5"W x 9.75"H
- Item Weight : 6.72 ounces
- External Testing Certification : IAPMO
- Product Benefits : Reduces contaminants, bad taste & odor, and lead for clean, fresh drinking and cooking water

Experience the difference clean, softened water makes in your daily life — from healthier skin to better tasting drinking water.
👉 Softer skin and smoother hair with every shower.
👉 Prevent scale buildup and keep your appliances running efficiently.
👉 Softer, brighter clothes that last longer with every wash.
See the Difference in Your Water — Instantly
Hard water, chlorine, and hidden contaminants can affect your health, skin, and appliances.
Our advanced filtration system removes impurities and delivers clean, safe water throughout your entire home.
Feel the difference in every drop — from your kitchen to your shower.
FAQ
Water Filtration & Home Water Guide