can this faucet be mounted in the Standard sprayer hole on sinks? (Approx 1 1/2 inch hole)

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.

Can you change the filter without turning off the water?

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.

What does this water filter remove? Mercury?

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.

At this level of filtering, would the water be equivalent to distilled water?

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!

Culligan Rc Ez 4 Premium Water Filtration Replacement Cartridge Under

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Description

💧 Elevate your water game—because your family deserves nothing less!

EFFORTLESS FILTER SWAP - EZ-Change system means no tools, no mess—just a quick twist and you’re done, saving you time and hassle.
VERSATILE INSTALLATION - Fits seamlessly under your sink or inside your refrigerator, providing clean water and ice wherever you need it.
CRYSTAL CLEAR HYDRATION - Delivers up to 500 gallons of fresh, great-tasting water—perfect for your home or office hydration needs.
TRUSTED QUALITY LONGEVITY - Backed by Culligan’s reputation and a 6-month filter life, so you never compromise on water quality or convenience.
ADVANCED CONTAMINANT DEFENSE - Certified to reduce chlorine, lead, cysts, mercury, VOCs, and more, ensuring every drop is pure and safe.

The Culligan RC-EZ-4 Premium Replacement Filter is a high-performance cartridge designed for EZ-Change systems, delivering up to 500 gallons of purified water. It effectively reduces chlorine taste and odor, sediment, lead, cysts, mercury, VOCs, and other contaminants. Certified by IAPMO to NSF/ANSI standards 42 and 53, it installs effortlessly with a quick twist, fitting under sinks or in refrigerators to provide clean drinking water and ice for up to 6 months.

Specifications

ASIN	B000NNPVVW
Best Sellers Rank	#4,293 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #34 in Replacement Under-Sink Water Filters
Brand	Culligan
Brand Name	Culligan
Capacity	500 Gallons
Customer Reviews	4.7 out of 5 stars 2,060 Reviews
Filter Life Cycle	6 Months
Global Trade Identification Number	00033663006522
Included Components	1 x Culligan RC-EZ-4 Replacement Filter
Installation Type	Under Sink
Item Type Name	Culligan RC-EZ-4 EZ-Change Premium Water Filtration Replacement Cartridge, 500 Gallons
Item Weight	2.6 Pounds
Manufacturer	Culligan
Material	Plastic
Material Type	Plastic
Maximum Flow Rate	0.5 Gallons Per Minute
Model Name	EZ-Change
Model Number	RC-EZ-4
Other Special Features of the Product	tool
Part Number	01019057
Power Source	Water Pressure
Purification Method	Activated Carbon
Smart Home Compatibility	Not Smart Home Compatible
Special Feature	tool
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
Unit Count	1.0 Count
Upper Temperature Rating	100 Degrees Fahrenheit

Reviews

J**.

1.02.2026

1**N

25.07.2024

R**O

2.09.2025

S**N

26.11.2015

J**T

27.02.2026

B**R

30.10.2019

B**I

7.04.2026

E**N

15.03.2026

H**.

13.07.2019

I**N

23.09.2021

L**R

25.05.2017

A**R

7.01.2020

N**.

14.11.2021

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Culligan RC-EZ-4 Premium Water Filtration Replacement Cartridge for Under-Sink, Refrigerator, & RV Systems - EZ Change Water Filter System (500 Gallon Life)

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