---
product_id: 4607483
title: "Culligan RC-EZ-4 Premium Water Filtration Replacement Cartridge for Under-Sink, Refrigerator, & RV Systems - EZ Change Water Filter System (500 Gallon Life)"
brand: "culligan"
price: "$148.36"
currency: USD
in_stock: true
reviews_count: 8
category: "Culligan"
url: https://www.desertcart.us/products/4607483-culligan-rc-ez-4-premium-water-filtration-replacement-cartridge-under
store_origin: US
region: United States of America
---

# 500 gallons filtration capacity EZ-Change tool-free installation NSF/ANSI certified multi-contaminant removal Culligan RC-EZ-4 Premium Water Filtration Replacement Cartridge for Under-Sink, Refrigerator, & RV Systems - EZ Change Water Filter System (500 Gallon Life)

**Brand:** culligan
**Price:** $148.36
**Availability:** ✅ In Stock

## Summary

> 💧 Upgrade your water game—because your health deserves the best sip!

## Quick Answers

- **What is this?** Culligan RC-EZ-4 Premium Water Filtration Replacement Cartridge for Under-Sink, Refrigerator, & RV Systems - EZ Change Water Filter System (500 Gallon Life) by culligan
- **How much does it cost?** $148.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/4607483-culligan-rc-ez-4-premium-water-filtration-replacement-cartridge-under)

## Best For

- culligan enthusiasts

## Why This Product

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

## Key Features

- • **Sleek & Space-Savvy:** Compact 3-inch diameter fits discreetly under your sink, keeping your kitchen clutter-free and stylish.
- • **Effortless Swap Tech:** EZ-Change design means no tools, no mess—replace your filter in minutes and never miss a beat.
- • **Crystal Clear Hydration:** Delivers up to 500 gallons of fresh, great-tasting water—perfect for your daily hydration goals.
- • **Under-Sink & Fridge Ready:** Seamlessly integrates with your existing Culligan EZ systems for clean water and ice on demand.
- • **Advanced Contaminant Defense:** Certified to reduce chlorine, lead, cysts, mercury, VOCs, and more for peace of mind in every sip.

## Overview

The Culligan RC 4 EZ-Change Premium Replacement Cartridge filters up to 500 gallons or 6 months of water, removing chlorine, lead, cysts, mercury, VOCs, and more. Its NSF/ANSI certifications guarantee high-quality contaminant reduction. Designed for easy, tool-free installation in Culligan EZ-Change systems under sinks or in refrigerators, it ensures consistently clean, great-tasting water and ice with minimal hassle.

## Description

Product Description The Culligan RC-EZ-4 EZ-Change Level 4 replacement filter cartridge will clean drinking water to reduce bad taste and odor from chlorine, sediment, lead, and cysts such as Cryptosporidium and Giardia, Mercury, Turbidity, Particulate Class I, VOC's, MTBE and Chloramines. The filter is easy to install and avoids the mess of changing traditional cartridges with buckets, towels, wrenches, and other tools. Installation hardware and tubing is included with this drinking water filter cartridge. This filter replacement from Culligan can be installed in EZ-Change systems under the sink in the refrigerator for drinking water and your ice maker. From the Manufacturer The Culligan RC-EZ-4 EZ-Change Level 4 Replacement Cartridge is a drinking water replacement filter that reduces bad taste and odor, Chlorine taste and odor, sediment, lead, and cysts such as Cryptosporidium and Giardia, Mercury, Turbidity, Particulate Class I, VOC's, MTBE and Chloramines.

Review: No leaks, water tastes delicious. No floaties. Easy install. - UPDATE Sep 2019: It's been more than a year using the SAME CARTRIDGE. Our water processing plant is currently having issues with the quality of water and its coming out of the pipes very dirty. Using just the BASIC cartridge, the water comes out crystal clear, drinkable. This baby is amazing. Still no leaks whatsoever. Buying another replacement cartridge now just in case. Oh, the nut that tightens the unit to the sink broke because its plastic. Just buy a steel nut and problem solved. Should cost you like 3 dollars. ------------------------------------------------------------------------------------------- ORIGINAL REVIEW: After reading the reviews on this, I was skeptical. Some people said that the filter was not of enough quality or that it would not filter the necessary impurities. I considered that we live in a metropolitan area where the city water is just about decent. So we went with the basic filter option. Also, a reverse osmosis system is very expensive and wastes a ton of water (about 3 gallons of waste per 1 gallon of drinkable water). I have to say the results are amazing, even with the Basic filter: - No solids or visible impurities in the water. This means no "floaties" or "flakes" which is the way people refer to the calcium, manganese or magnesium precipitates that can be seen in cold or room-temp water. Although these precipitates are harmless (they in fact occur naturally in other foods we eat), they taste funky and look rather discouraging to drink. This filter took out all of that. - The taste of the water is great. Even at room-temp, the water is easy to drink and delicious. - the water pressure is quite nice with the basic filter. (see pictures) As for the installation, just follow the instructions and a few Pro-tips: PRO TIP: The mark included in the white silicone tube is 5/8 inch long. When you cut the tube to your liking, go ahead and mark the other side so you'll have no trouble fitting it to the right depth. PRO TIP: If you need to drill the extra hole in your sink. It will require the 9/16 bit. I tried the 5/8 hole as mentioned in the instruction, but the white tube does not fit. Use these to drill the hole: - TEMO M35 cobalt 9 size double flute step drill 3/8" shank 1/4" to 3/4" - CRC 03400 16oz Truetap Cutting Fluid Heavy Duty - Starrett 117C Center Punch With Round Shank, 4" Length, 1/8" Tapered Point Diameter You can check out my reviews on these 3 tools as well, for more details on how to use each for this application. PRO TIP: DO USE plumber's tape (the white one) on all male fittings. This will ensure no leakage. PRO TIP: when i first turned on the water, nothing came out. This was because the filter needed to click TWICE when tightening it in. Just make sure its nice and tight. Installation observations: - No leaks whatsoever were observed. A few people have complained about leaks, for us, this was not the case. We did use plumber's tape. - The process was very straightforward. Took us more time to clear out the area under the sink, than it took to install. - We left the filter loose (did not mount with screws) to be able to take it out and replace it easier.
Review: Perfect, Simple Easy Install - I purchased this to replace an inline filter installed by my plumber two years ago. In order to replace the filter he had installed I would have to go down into the crawl space under my condo which is a long trip through three fire doors which starts in a full basement and ends under my place which is a dark crawl space about five feet high where the shut off is. Then I would have to go back upstairs dissassemble the filter, unscrew the compression fittings and then go back down under to turn the water on and hope nothing was leaking when I went back upstairs. Needless to say I didn't change the filter until it clogged and the icemaker stopped working. This gem took less than 10 minutes to install start to finish, including mounting, and I never have to make that trip again to change a filter. I have copper tubing that comes up about 10 inches out of the floor and from there plastic tubing is joined which ran about two feet to the existing filter and then there was about three feet of plastic tubing running from the filter to the fridge. I took a chance and did not turn off the water. Using my garbage can to catch any water I cut the fridge side of the tubing from the existing filter and a bit of water drained out. I inserted this cut end into fridge side of the new filter housing. I then (holding it over the garbage can) cut the water source side of the tubing from the existing filter and quickly inserted the tubing into the new filter casing. The cut wasn't clean, water sprayed out and the tube was not secure, so I removed it made a clean cut and reinserted - perfect. About a gallon of water ended up in the garbage can between cuts. I mounted the casing with two self drilling drywall anchors and secured the tubing into a foot diameter circular return with a twisty tie. It's working perfectly, no leaks, and the icemaker is once again making ice. I'm thinking of replacing my undersink filter with one of these when I use up my filters, it's a good filter but the housing has to be cleaned with bleach and it takes about a half hour to clean the houseing and change the filters and this is just so much easier, just unscrew the filter and swap it out. For the price this is terrific!

## Features

- Provide your family with visibly clean, great-tasting water for drinking and cooking
- FEATURES: Reduces water bad taste and odor, Chlorine taste and odor, sediment, lead, and cysts such as Cryptosporidium and Giardia, Mercury, Turbidity, Particulate Class I, VOC's, MTBE and Chloramines; Can be installed in your EZ-Change filter system under the sink or in the refrigerator for clean water and ice
- COMPATIBILITY: Works with Culligan US-EZ-1, US-EZ-3 and US-EZ-4 systems
- FILTER LIFE: Up to 500 gallons or 6 months depending on usage and filtration load
- CERTIFICATION: Tested/certified by IAPMO to NSF/ANSI Standard 42 for the aesthetic reduction of Chlorine Taste/Odor, Chloramines, and Nominal Particulate Class 1; Standard 53 for reduction of Cysts, Mercury, lead, VOC, MTBE and Turbidity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000NNPVVW |
| Assembled Diameter | 3 Inches |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Nickel Oxyhydroxide |
| Best Sellers Rank | #2,750 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #27 in Replacement Under-Sink Water Filters |
| Brand | Culligan |
| Certification | Chlorine Reduction |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (8,291) |
| Cutting Diameter | 3 Inches |
| Date First Available | April 16, 2022 |
| Global Trade Identification Number | 00033663006522 |
| Installation Type | Under Sink |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 2.6 pounds |
| Item model number | RC-EZ-4 |
| Manufacturer | Culligan |
| Maximum Flow Rate | 0.5 Gallons Per Minute |
| Model Name | EZ-Change |
| Mounting Type | Plate Mount |
| Number Of Pieces | 1 |
| Part Number | 01019057 |
| Pattern | Cartridge |
| Size | EZ-4 (Best Filtration) |
| Special Feature | tool |
| Special Features | tool |
| Style | Replacement Filter |
| Supported Water TDS Level Maximum (PPM) | 500 |
| UPC | 182682383982 808112763192 115971041201 163120786381 807032975135 885140840064 885123058776 033663006522 885343041497 643749858688 783324973341 882664803070 885669322263 885437804496 885122999049 885188951982 885656343295 885876917849 132017517247 885425268309 809390005813 887659483367 |
| Upper Temperature Rating | 100 Degrees Fahrenheit |
| Water Consumption | 500 Gallons |

## Product Details

- **Brand:** Culligan
- **Capacity:** 500 Gallons
- **Included Components:** 1 x Culligan RC-EZ-4 Replacement Filter
- **Installation Type:** Under Sink
- **Item Weight:** 2.6 Pounds
- **Material:** Plastic
- **Maximum Flow Rate:** 0.5 Gallons Per Minute
- **Model Name:** EZ-Change
- **Purification Method:** Activated Carbon
- **Special Feature:** tool

## Images

![Culligan RC-EZ-4 Premium Water Filtration Replacement Cartridge for Under-Sink, Refrigerator, & RV Systems - EZ Change Water Filter System (500 Gallon Life) - Image 1](https://m.media-amazon.com/images/I/71izvIrUQGL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: can this faucet be mounted in the Standard sprayer hole on sinks? (Approx 1 1/2 inch hole)**
A: Can you, Yes.  But the problem is that the base of this is just a tiny bit smaller the 1.25 inches.  So it will NOT cover the hole completely since it is in an oval shape NOT round.

**Q: Can you change the filter without turning off the water?**
A: Yes you can change the filter with the water on. When you twist the filter to remove an old one, it physically disconnects, then when you twist the new one in, water flow returns.

**Q: What does this water filter remove?  Mercury?**
A: The included EZ-1 filter (according to the manual) states chlorine, class 3 particulates, and Standard 42.  ANSI Standard 42 is for chlorine(taste/odor), chloramines, iron, manganese, hydrogen sulfide, pH neutralization, and zinc reduction.  Mercury would fall under Standard 53, which includes heavy metals (arsenic, cadmium, chromium, copper, lead, mercury, selenium), inorganics (fluoride & nitrate, nitrite) and volatile organic chemicals (chloroform surrogate). For these you need the EZ-3 filter.

**Q: At this level of filtering, would the water be equivalent to distilled water?**
A: Only a "still" or distillery can make "distilled" water. If done correctly the water should be "chemically pure". Neither reverse osmosis (RO) nor any kind of filter will even come close!

## Customer Reviews

### ⭐⭐⭐⭐⭐ No leaks, water tastes delicious. No floaties. Easy install.
*by R***Y on August 7, 2017*

UPDATE Sep 2019: It's been more than a year using the SAME CARTRIDGE. Our water processing plant is currently having issues with the quality of water and its coming out of the pipes very dirty. Using just the BASIC cartridge, the water comes out crystal clear, drinkable. This baby is amazing. Still no leaks whatsoever. Buying another replacement cartridge now just in case. Oh, the nut that tightens the unit to the sink broke because its plastic. Just buy a steel nut and problem solved. Should cost you like 3 dollars. ------------------------------------------------------------------------------------------- ORIGINAL REVIEW: After reading the reviews on this, I was skeptical. Some people said that the filter was not of enough quality or that it would not filter the necessary impurities. I considered that we live in a metropolitan area where the city water is just about decent. So we went with the basic filter option. Also, a reverse osmosis system is very expensive and wastes a ton of water (about 3 gallons of waste per 1 gallon of drinkable water). I have to say the results are amazing, even with the Basic filter: - No solids or visible impurities in the water. This means no "floaties" or "flakes" which is the way people refer to the calcium, manganese or magnesium precipitates that can be seen in cold or room-temp water. Although these precipitates are harmless (they in fact occur naturally in other foods we eat), they taste funky and look rather discouraging to drink. This filter took out all of that. - The taste of the water is great. Even at room-temp, the water is easy to drink and delicious. - the water pressure is quite nice with the basic filter. (see pictures) As for the installation, just follow the instructions and a few Pro-tips: PRO TIP: The mark included in the white silicone tube is 5/8 inch long. When you cut the tube to your liking, go ahead and mark the other side so you'll have no trouble fitting it to the right depth. PRO TIP: If you need to drill the extra hole in your sink. It will require the 9/16 bit. I tried the 5/8 hole as mentioned in the instruction, but the white tube does not fit. Use these to drill the hole: - TEMO M35 cobalt 9 size double flute step drill 3/8" shank 1/4" to 3/4" - CRC 03400 16oz Truetap Cutting Fluid Heavy Duty - Starrett 117C Center Punch With Round Shank, 4" Length, 1/8" Tapered Point Diameter You can check out my reviews on these 3 tools as well, for more details on how to use each for this application. PRO TIP: DO USE plumber's tape (the white one) on all male fittings. This will ensure no leakage. PRO TIP: when i first turned on the water, nothing came out. This was because the filter needed to click TWICE when tightening it in. Just make sure its nice and tight. Installation observations: - No leaks whatsoever were observed. A few people have complained about leaks, for us, this was not the case. We did use plumber's tape. - The process was very straightforward. Took us more time to clear out the area under the sink, than it took to install. - We left the filter loose (did not mount with screws) to be able to take it out and replace it easier.

### ⭐⭐⭐⭐⭐ Perfect, Simple Easy Install
*by S***E on April 17, 2014*

I purchased this to replace an inline filter installed by my plumber two years ago. In order to replace the filter he had installed I would have to go down into the crawl space under my condo which is a long trip through three fire doors which starts in a full basement and ends under my place which is a dark crawl space about five feet high where the shut off is. Then I would have to go back upstairs dissassemble the filter, unscrew the compression fittings and then go back down under to turn the water on and hope nothing was leaking when I went back upstairs. Needless to say I didn't change the filter until it clogged and the icemaker stopped working. This gem took less than 10 minutes to install start to finish, including mounting, and I never have to make that trip again to change a filter. I have copper tubing that comes up about 10 inches out of the floor and from there plastic tubing is joined which ran about two feet to the existing filter and then there was about three feet of plastic tubing running from the filter to the fridge. I took a chance and did not turn off the water. Using my garbage can to catch any water I cut the fridge side of the tubing from the existing filter and a bit of water drained out. I inserted this cut end into fridge side of the new filter housing. I then (holding it over the garbage can) cut the water source side of the tubing from the existing filter and quickly inserted the tubing into the new filter casing. The cut wasn't clean, water sprayed out and the tube was not secure, so I removed it made a clean cut and reinserted - perfect. About a gallon of water ended up in the garbage can between cuts. I mounted the casing with two self drilling drywall anchors and secured the tubing into a foot diameter circular return with a twisty tie. It's working perfectly, no leaks, and the icemaker is once again making ice. I'm thinking of replacing my undersink filter with one of these when I use up my filters, it's a good filter but the housing has to be cleaned with bleach and it takes about a half hour to clean the houseing and change the filters and this is just so much easier, just unscrew the filter and swap it out. For the price this is terrific!

### ⭐⭐⭐⭐⭐ Don't be alarmed if the water tastes different...that's a good thing!
*by T***R on January 20, 2024*

Fairly easy to install. I didn't have any leaks. Water comes out cloudy at first but then clears up as it settles (I guess from going through the filter media). Tastes a little different than before, but maybe that's because I'm used to the chlorine taste that it previously had and now it has no taste?. Overall, very satisfied. I did call tech support for a question on how far the tubing went into the culligan faucet (5/8 inch or all the way which is about 2 inches) because the manual wasn't clear here (just said to push 'firmly' into the faucet). The tech did not call back until the following day, but said it only goes in a short distance so the ferrule compression ring compresses on the tubing where the T insert is fitted into the end of the tubing. Makes sense to me...the insert gives it strength so the compression washer doesn't crush the tubing. I originally had the tubing pushed all the way into the faucet and still did not have a leak. Another thing I did was to cut a piece of 5/8 inch plywood to use as a template that I could hold firmly against the wall to drill the hole in a granite countertop for the faucet and to keep the bit from walking. I drilled a 5/8 inch hole (same size as the bit I was using to drill through the granite countertop) in the plywood where I wanted the hole and used it to guide the diamond coated bit to cut through the countertop. This worked perfectly. I kept dipping the diamond coated bit in water every 30 seconds to clean it and keep it cool. It only took about 5 minutes or so and I was through. Perfect clean cut.

## Frequently Bought Together

- Culligan RC Change Premium Water Filtration Replacement Cartridge, 500 Gallons, EZ-4 (Best), White
- everydrop by Whirlpool Ice and Water Refrigerator Filter 1, EDR1RXD1, Single-Pack , Purple
- everydrop by Whirlpool Ice and Water Refrigerator Filter 4, EDR4RXD1, Single-Pack

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-22*