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.

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.

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?

Does this remove flouride?

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

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– iSpring CUA4 4-Stage 0.01μm Ultra Filtration Under Sink Water Filter System

Product ID: 48256916

Details

Brand
iSpring
Capacity
8000 gallons
Included components
Under Sink
Installation type
Under Sink
Material
Polyvinyl
Package information
Faucet

💧0.01 micron ultra-filtration membrane

🚫No wastewater, tankless design

⚙️4-stage advanced filtration system

¥80860

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Description

💧 Elevate your tap water game—pure, powerful, and hassle-free!

BUILT TO LAST PERFORM - Filters up to 8,000 gallons with NSF/ANSI certified components ensuring safety and reliability for 6-12 months.
CRYSTAL CLEAR HYDRATION - Removes 99.99% of chlorine, lead, arsenic & contaminants while preserving essential minerals.
NEXT LEVEL FILTRATION TECH - 4-stage system with PP sediment, ultrafiltration, KDF/GAC, and activated carbon for superior water purity.
SLEEK SUSTAINABLE DESIGN - Tankless system means zero wastewater and a premium chrome faucet that elevates your kitchen aesthetic.
EFFORTLESS INSTALLATION MAINTENANCE - Push-to-connect fittings and twist-on/off filters make setup and replacements a breeze—no plumber needed.

The iSpring CU-A4 is a premium under-sink water filtration system featuring a cutting-edge 4-stage ultra-filtration process with a 0.01 micron membrane. It removes up to 99.99% of harmful contaminants including chlorine, lead, and arsenic, while retaining beneficial minerals. Designed for easy installation and maintenance, it operates without electricity or wastewater, delivering up to 8,000 gallons of clean water through a stylish chrome faucet. Certified to NSF/ANSI standards, this tankless system is perfect for health-conscious professionals seeking reliable, eco-friendly hydration.

Specifications

ASIN	B009AEJWZG
Best Sellers Rank	200,785 in DIY & Tools ( See Top 100 in DIY & Tools ) 121 in Under-Sink Filters
Brand	iSpring
Capacity	8000 gallons
Container Type	Faucet
Country Of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (706)
EU Spare Part Availability Duration	12 Months
Filter Life Cycle	6 Months
Global Trade Identification Number	00662425053063
Included Components	Under Sink Water Filter, 3/8"&1/2" Adapter, Faucet, Mounting Bracket
Installation Type	Under Sink
Item Dimensions L x W x H	37.8L x 9.9W x 34H centimetres
Item Highlight	Tankless 4-Stage High Capacity , Remove 99.99% Contaminants, Quick Filter Change with Chrome Faucet, White
Item Type Name	4-Stage High Capacity Premium Under Sink Drinking Water System with 0.1 micron Ultra Filtration membrane
Item Weight	2 Kilograms
LowerTemperature Range	40 Degrees Fahrenheit
Manufacturer	iSpring Water Systems
Manufacturer Part Number	CU-A4
Material Type	Polyvinyl Chloride
Model Name	CU-A4
Model Number	CU-A4
Number of Items	1
Number of Packs	1
Other Special Features of the Product	Removes up to 99% of chlorine and chlorine treatment by-products, lead, arsenic, and much more, while retaining minerals.
Power Source	Water Pressure(without electricity)
Purification Method	Ultra Filtration
Supported Water TDS Level Maximum (PPM)	500
UPC	662425053063
Unit Count	1.0 count
Upper Temperature Rating	100 Degrees Fahrenheit

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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¥80860

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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