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iSpring CU-A4 Ultra-Filtration Under Sink Water Filter System, Tankless 4-Stage High Capacity, Remove 99.99% Contaminants, Quick Filter Change with Chrome Faucet, White

iSpring CU-A4 Ultra-Filtration Under Sink Water Filter System, Tankless 4-Stage High Capacity, Remove 99.99% Contaminants, Quick Filter Change with Chrome Faucet, White

Q: How many gallons of water will be treated during a filter's lifespan, before they need to be replaced? Also, is there a change indicator?

The actual gallon life will vary from customer to customer. As with all replaceable filter cartridges, they have limited space to hold the contaminants they remove from your water. This means that the higher concentration of junk you have in your source water, the faster the filters will run out space to keep filtering and vice versa. The average is about 1100 gallons, but this number may not represent your source water, so individual results could either be more or less than the average.

Q: Has anyone tested the water that comes out of the filter with a TDS meter? I checked mine today and found that the TDS was the same as the tap water

Per Josh @ iSpring 3/7/2017 - this will not remove minerals present in your city's tap water, so there should be little difference in total dissolved solids (TDS) count.

Q: Can I connect existing water line(previously connect to refrigerator,tiny size) to this unit or I have use a adaptor? and can I only connect to refrig

I answered this before, but after re-reading your question I need to revise my original answer. If you are planning on using this as a primary filtered water supply you will probably find that there is not enough water flow through the original water line that is supplying water to your refrigerator. Maximum flow rate is a function of the diameter of the supply line (among other factors). You could make it work if you had to, but I am thinking the flow rate might be kind of feeble. Why not take the supply from under the sink in the kitchen?

Q: Does this remove flouride?

Hi ajb, Unfortunately this unit does not remove fluoride. You will need reverse osmosis in order to remove fluoride. ThanksClaudia

Product ID: 48256916

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Details

Material
Plastic
Product dimensions
11.5D x 26W x
Item weight
2 Kilograms
External testing certification
ANSI NSF
Product benefits
Removes and

💧4-stage ultra-filtration tech

🔄Twist-on filter change

⚙️Tankless design, zero wastewater

Description

💧 Pure water, zero hassle—filter smarter, live better.

SLEEK SPACE SAVVY - Tankless under-sink system fits seamlessly in modern kitchens, freeing up valuable space.
PREMIUM CHROME FAUCET - Stylish, durable faucet elevates your kitchen aesthetic while delivering pure, fresh water.
EFFORTLESS MAINTENANCE - Twist-on/twist-off filters with color-coded tubing make replacements a breeze—no plumber needed.
CRYSTAL CLEAR HYDRATION - Removes 99.99% contaminants including lead & chlorine by-products without stripping essential minerals.
ECO FRIENDLY EFFICIENCY - Zero wastewater design means every drop counts—save water while you sip.

The iSpring CU-A4 is a tankless, 4-stage under-sink water filtration system that removes up to 99.99% of harmful contaminants like chlorine, lead, and arsenic while preserving beneficial minerals. Featuring advanced ultrafiltration and KDF/GAC technology, it delivers clean, great-tasting water without producing wastewater. Its quick twist-on filter replacement and premium chrome faucet combine convenience with sleek design, making it ideal for health-conscious professionals seeking effortless, high-capacity water purification.

Have a Question? See What Others Asked

How many gallons of water will be treated during a filter's lifespan, before they need to be replaced? Also, is there a change indicator?

Has anyone tested the water that comes out of the filter with a TDS meter? I checked mine today and found that the TDS was the same as the tap water

Can I connect existing water line(previously connect to refrigerator,tiny size) to this unit or I have use a adaptor? and can I only connect to refrig

Does this remove flouride?

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

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Brand	iSpring
Model Number	CU-A4
Colour	Coffee,white
Product Dimensions	26.67 x 11.43 x 31.75 cm; 2 kg
Capacity	500 gallons
Material	Plastic
Special Features	Tankless
Item Weight	2 kg

iSpring CU-A4 Ultra-Filtration Under Sink Water Filter System, Tankless 4-Stage High Capacity, Remove 99.99% Contaminants, Quick Filter Change with Chrome Faucet, White

Details

Description

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