---
product_id: 223866734
title: "Waterdrop RC 4 EZ-Change Premium Water Filter Replacement, Replacement for Culligan® RC-EZ-4, IC-EZ-4, US-EZ-4, RC-EZ-3, DuPont® WFQTC30001, WFQTC70001, 2K Gallons (Pack of 2)"
brand: "waterdrop"
price: "$414992"
currency: COP
in_stock: true
reviews_count: 8
category: "Waterdrop"
url: https://www.desertcart.co/products/223866734-waterdrop-rc-4-ez-change-premium-water-filter-replacement-replacement
store_origin: CO
region: Colombia
---

# 2,000 gallons / 12 months lifespan Coconut shell carbon block Fits multiple major brands Waterdrop RC 4 EZ-Change Premium Water Filter Replacement, Replacement for Culligan® RC-EZ-4, IC-EZ-4, US-EZ-4, RC-EZ-3, DuPont® WFQTC30001, WFQTC70001, 2K Gallons (Pack of 2)

**Brand:** waterdrop
**Price:** $414992
**Availability:** ✅ In Stock

## Summary

> 💧 Upgrade your hydration game with the ultimate EZ-Change filter!

## Quick Answers

- **What is this?** Waterdrop RC 4 EZ-Change Premium Water Filter Replacement, Replacement for Culligan® RC-EZ-4, IC-EZ-4, US-EZ-4, RC-EZ-3, DuPont® WFQTC30001, WFQTC70001, 2K Gallons (Pack of 2) by waterdrop
- **How much does it cost?** $414992 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/223866734-waterdrop-rc-4-ez-change-premium-water-filter-replacement-replacement)

## Best For

- waterdrop enthusiasts

## Why This Product

- Trusted waterdrop brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Food-Grade Safety:** Premium plastic housing ensures zero impurity leaching—drink with confidence.
- • **Stable & Fast Flow:** Enjoy consistent water pressure without sacrificing filtration quality.
- • **Universal Compatibility:** Seamlessly replaces Culligan, DuPont, Brita & more—no keying hassles.
- • **Advanced Filtration Tech:** Supreme coconut shell carbon block slashes chlorine, heavy metals, rust & odors.
- • **Long-Lasting Performance:** Filters up to 2,000 gallons or 12 months for uninterrupted pure water.

## Overview

Waterdrop RC 4 EZ-Change Premium Water Filter Replacement offers a high-efficiency coconut shell carbon block filter compatible with multiple major brands including Culligan and DuPont. Designed for up to 2,000 gallons or 12 months of use, it reduces chlorine, heavy metals, sediment, and odors while maintaining stable water flow. Its food-grade plastic housing ensures safe, clean water, making it a cost-effective, long-lasting solution for professional households seeking premium filtration.

## Description

Buy Waterdrop RC 4 EZ-Change Premium Water Filter Replacement, Replacement for Culligan® RC-EZ-4, IC-EZ-4, US-EZ-4, RC-EZ-3, DuPont® WFQTC30001, WFQTC70001, 2K Gallons (Pack of 2): Replacement Under-Sink Water Filters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: So far so good - Ordered Prime yesterday, arrived today less than 24-h. Stellar. I have been with the EZ Twist system since it was in Dupont filters many years ago. Dupont's water filter business had subsequently been taken over by Culligan. The same EZ Twist format is currently used by Brita products at Home Depot and AC Moore products at Lowes in the US. Culligan has since moved on to a different format and thus their current line of filters no longer includes the EZ Twist system. Currently, any Culligan branded EZ twist system is either being sold at clearance prices - or in some cases scalped at ridiculous prices. In this Waterdrop filter listing, I found that I can get two of the EZ 4 compatible carts for less than what I expected. Waterdrop also has EZ 1 and EZ 3 carts also for much less than EZ 4. Thanks to Waterdrop's listing, I discovered that the Culligan and Dupont brands are completely interchangeable between any of the EZ 1,2, or 4 carts and I decided to order some EZ4 and try them out. I already have enough EZ1 and 3 carts. When they get discontinued at the big box stores, they go on liquidation for ridiculous prices - and over the years I have more EZ1 and 3 carts branded Cultigen, Dupont, and Brita than I would need for over 5-years. The Ez 4 filters are larger than the Ez 1 and 3 I used previously, but I already knew that from the item description. Something new, was that there was a sealing cap on the filter that I had never seen on any previous filters. When I removed this plug, a sudden rush of air whooshed through the filter opening - leading me to believe that it was packed under a specific gas and/or pressure conditions to preserve it until use. I don't know if it makes any difference or not, but it's something new. The filter installed without a hitch into my old Dupont Basic housing (later rebranded as the Culligan EZ 1 and now discontinued). When priming the filter, a lot of air came out for a while - which is new. After priming it, the results are stellar. I was probably fine with the EZ1 cart I had been using for years - I have a sediment filter inline before it. I can tell there is a difference between the Dupont or Culligan Ez 1 cart I was using, but I don't know if it's any better yet. I know the water is still odorless and almost tasteless. Comparing it to unfiltered, the unfiltered has a strong odor of chlorine and has a somewhat funky taste while and shortly after drinking. Granted, the EZ1 filter did the same thing and the funky tastes of the unfiltered water are easily masked by mixing with a flavor. However, for the price I paid, these filters are a bargain. I hope they stay around the same price. Art the rate I use filters, it will be some months before I need more. EDIT: This manufacturer is genius in that it has removed the keying system and allowed it to fit into Culligan, Dupont, Brita, and most likely AO Smith systems. The OEM carts have a keying system that will not allow a name brand cart to fit into a different brand. But without the keying system and only the 2 holes - this particular line of filters by Waterdrop is interchangeable between all these, and probably more , brands. GENIUS!
Review: Great filters! - These filters are excellent. I installed them into my two Culligan filter housings - sink and ice maker. They fit perfectly, and do not leak. Some older Culligan housings become loose internally and may not seal properly due to the weight of these cartridges. But, replacing your old housing with a Culligan ice maker kit is dirt cheap and fixes the issue. I don't know if these offer the exact same level of filtration as the Culligan EZ-4 filters, as Waterdrop doesn't include this information on desertcart's site nor does their customer service have that information readily available. I know this because I called them and asked. Still, unless you're filtering well water, or another ground source, you'll have no worries. All municipal water has to pass strict cleanliness requirements, so you're filtering already safe water. The premium Waterdrop filter makes absolutely clean water. I live in Las Vegas where we have some of the hardest water in the country, and these filters have solved every taste and scale issue I had. They're half the price of Culligan's EZ-4 filters, and last six times as long. This is the textbook example of a no-brainer decision.

## Features

- 【Compatible models】: Interchangeable with Culligan RC-EZ-1, RC-EZ-3, RC-EZ-4, compatible with IC-EZ, US-EZ, RV-EZ system; DuPont WFQTC30001, WFQTC70001, WFQTC90001.
- 【Efficient filtration】: With supreme coconut shell carbon block, Waterdrop filter can effectively reduce chlorine, heavy metals like taste and odor, sediment, rust, Turbidity, Particulate Class I. The high impurities reduction rate ensures that the water we give to you is clean and healthy.
- 【Food-grade plastic housing】: Waterdrop uses food-grade plastic housing to free you from worrying about impurity leaching back to your water.
- 【Stable flow rate】: The fast yet stable water flow is another advantage for further filtration.
- 【New upgrade & Long service life】: After advanced upgrade, the model number is changed from WD-RC-EZ-4 into WD-W35Z4. Enjoy refreshing taste by changing your filter every 12 months or 2,000 gallons. Still, it depends on your local water quality.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08BG2SZJG |
| Best Sellers Rank | #96,036 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #688 in Replacement Under-Sink Water Filters |
| Brand | Waterdrop |
| Compatible Water Purifier Models | Culligan US-EZ-4 |
| Customer Reviews | 4.5 4.5 out of 5 stars (272) |
| Date First Available | June 18, 2020 |
| External Testing Certification | NSF |
| Item Weight | 3.76 pounds |
| Item model number | WD-W35Z4 |
| Manufacturer | Waterdrop |
| Material | Carbon,Coconut Shell |
| Number of Items | 2 |
| Package Dimensions | 13.62 x 7.91 x 3.82 inches |
| Product Benefits | Reduces Odor, Taste and Chlorine |
| Set Name | RC-EZ-4 |
| UPC | 840814177631 |
| Unit Count | 2.0 Count |

## Product Details

- **Brand:** Waterdrop
- **External Testing Certification:** NSF
- **Material:** Carbon,Coconut Shell
- **Product Benefits:** Reduces Odor, Taste and Chlorine
- **Set Name:** RC-EZ-4

## Images

![Waterdrop RC 4 EZ-Change Premium Water Filter Replacement, Replacement for Culligan® RC-EZ-4, IC-EZ-4, US-EZ-4, RC-EZ-3, DuPont® WFQTC30001, WFQTC70001, 2K Gallons (Pack of 2) - Image 1](https://m.media-amazon.com/images/I/61EhQOSGPwL.jpg)

## Questions & Answers

**Q: Would this filter fit Avalon B8BLK?**
A: Hi,
Thanks for your interest in our filter product.

Truly sorry but no,  it does not seem to be compatible with your model. 

If you have any other questions, please feel free to contact us.

Enjoy the rest of your day!

Kind Regards
Mia Lauren　
Customer Service Rep

**Q: 4ea are coming for 1 order? Its about 12 bucks per count**
A: Not sure of your question. The model # for each filter is RC 4 EZ.  Can’t be for $12 each. More like $48-$50 each. I’ve never purchased them at that price but I wish I could!!!!

**Q: Do these filters have nsf and ansi certification like the fridge water drop filters?**
A: Not sure, but you might read the specs on the page.  If not there, contact the seller.

**Q: What chemicals does it filter?**
A: I don't know. I assume you could get on Amazon.com and find a product description of it.

## Customer Reviews

### ⭐⭐⭐⭐⭐ So far so good
*by M***U on July 30, 2021*

Ordered Prime yesterday, arrived today less than 24-h. Stellar. I have been with the EZ Twist system since it was in Dupont filters many years ago. Dupont's water filter business had subsequently been taken over by Culligan. The same EZ Twist format is currently used by Brita products at Home Depot and AC Moore products at Lowes in the US. Culligan has since moved on to a different format and thus their current line of filters no longer includes the EZ Twist system. Currently, any Culligan branded EZ twist system is either being sold at clearance prices - or in some cases scalped at ridiculous prices. In this Waterdrop filter listing, I found that I can get two of the EZ 4 compatible carts for less than what I expected. Waterdrop also has EZ 1 and EZ 3 carts also for much less than EZ 4. Thanks to Waterdrop's listing, I discovered that the Culligan and Dupont brands are completely interchangeable between any of the EZ 1,2, or 4 carts and I decided to order some EZ4 and try them out. I already have enough EZ1 and 3 carts. When they get discontinued at the big box stores, they go on liquidation for ridiculous prices - and over the years I have more EZ1 and 3 carts branded Cultigen, Dupont, and Brita than I would need for over 5-years. The Ez 4 filters are larger than the Ez 1 and 3 I used previously, but I already knew that from the item description. Something new, was that there was a sealing cap on the filter that I had never seen on any previous filters. When I removed this plug, a sudden rush of air whooshed through the filter opening - leading me to believe that it was packed under a specific gas and/or pressure conditions to preserve it until use. I don't know if it makes any difference or not, but it's something new. The filter installed without a hitch into my old Dupont Basic housing (later rebranded as the Culligan EZ 1 and now discontinued). When priming the filter, a lot of air came out for a while - which is new. After priming it, the results are stellar. I was probably fine with the EZ1 cart I had been using for years - I have a sediment filter inline before it. I can tell there is a difference between the Dupont or Culligan Ez 1 cart I was using, but I don't know if it's any better yet. I know the water is still odorless and almost tasteless. Comparing it to unfiltered, the unfiltered has a strong odor of chlorine and has a somewhat funky taste while and shortly after drinking. Granted, the EZ1 filter did the same thing and the funky tastes of the unfiltered water are easily masked by mixing with a flavor. However, for the price I paid, these filters are a bargain. I hope they stay around the same price. Art the rate I use filters, it will be some months before I need more. EDIT: This manufacturer is genius in that it has removed the keying system and allowed it to fit into Culligan, Dupont, Brita, and most likely AO Smith systems. The OEM carts have a keying system that will not allow a name brand cart to fit into a different brand. But without the keying system and only the 2 holes - this particular line of filters by Waterdrop is interchangeable between all these, and probably more , brands. GENIUS!

### ⭐⭐⭐⭐⭐ Great filters!
*by P***. on May 16, 2025*

These filters are excellent. I installed them into my two Culligan filter housings - sink and ice maker. They fit perfectly, and do not leak. Some older Culligan housings become loose internally and may not seal properly due to the weight of these cartridges. But, replacing your old housing with a Culligan ice maker kit is dirt cheap and fixes the issue. I don't know if these offer the exact same level of filtration as the Culligan EZ-4 filters, as Waterdrop doesn't include this information on Amazon's site nor does their customer service have that information readily available. I know this because I called them and asked. Still, unless you're filtering well water, or another ground source, you'll have no worries. All municipal water has to pass strict cleanliness requirements, so you're filtering already safe water. The premium Waterdrop filter makes absolutely clean water. I live in Las Vegas where we have some of the hardest water in the country, and these filters have solved every taste and scale issue I had. They're half the price of Culligan's EZ-4 filters, and last six times as long. This is the textbook example of a no-brainer decision.

### ⭐⭐⭐⭐ Water Filters
*by I***R on June 11, 2025*

Quick delivery at a decent price.

## Frequently Bought Together

- Waterdrop Premium Water Filter Replacement, EZ-Change for Culligan RC, IC, US-EZ, 2K Gallons, Pack of 2
- Waterdrop Advanced Water Filter Replacement - RC 3, EZ Change - 2K Gallons (Pack of 2) for Culligan, Brita, DuPont & More
- Waterdrop RC 1 EZ-Change, WFQTC30001, WFQTC70001 Basic Water Filtration Replacement, Replacement for Culligan® IC-EZ-1, US-EZ-1, RV-EZ-1, Brita® USF-201, USF-202, DuPont®, 3K Gallons (Pack of 2)

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*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-02-21*