iSpring F4-CUA4 Replacement Pack for 4-Stage Ultra Filtration System CU-A4, Sediment, UF, KDF, and Activated Carbon Filter, 4pcs
$95.99
Triple the Savings, Triple the Joy!
About this item
- 1st Stage: 5 Micron sediment filter removes rust, sand, and solid impurities in the water to protect the delicate UF membrane.
- 2nd Stage: UF Hollow Fiber membrane that uses standard home water pressure to push water through a semi-permeable membrane.
- 3rd Stage: KDF media (or Kinetic Degradation Fluxion Media) with activated carbon.
- 4th Stage: Post Activated Carbon Filter. Adopting coconut shell activated carbon with ultra-micron aperture, this carbon filter absorbs residual chlorine, and odor.
Share
Frequently Bought Together
iSpring F4-CUA4 Replacement Pack for 4-Stage Ultra Filtration System CU-A4, Sediment, UF, KDF, and Activated Carbon Filter, 4pcs
$95.99
- Availability: In Stock
- Model: F4-CUA4
- Manufacturer: iSpring
Reviews with images
Write Review
robert | 
2021-04-04
Why should I buy one if you don't have replacement filters or don't reply to reviews.
2021-04-04
Why should I buy one if you don't have replacement filters or don't reply to reviews.
Sam |
2021-02-21
Is it discontinued ?
It's out of stock everywhere
Also after over 6 months of use, I still get a slight layer of oil from the faucet. Keep in mind that I flushed 15 gallons the 1st time I used it, but still, it releases oil with the water.
2021-02-21
Is it discontinued ?
It's out of stock everywhere
Also after over 6 months of use, I still get a slight layer of oil from the faucet. Keep in mind that I flushed 15 gallons the 1st time I used it, but still, it releases oil with the water.
Sherene Sturtevant | 
2020-04-17
Before the system, I was drinking bottled water and recycling the bottles. Now I can enjoy the pure water comes out my tap.
2020-04-17
Before the system, I was drinking bottled water and recycling the bottles. Now I can enjoy the pure water comes out my tap.
Donn Montenegro | 
2020-01-29
Easy install, good instructions, superb results! It actually tastes a lot better than bottled water.
2020-01-29
Easy install, good instructions, superb results! It actually tastes a lot better than bottled water.
Orlan Jennings |
2023-12-02
This is a great filter system. My wife has multiple chemical sensitivities and this filter works very well for her. It is also very easy to replace. I usually have a set in storage and when I change them out, I buy a new set, ready to go.
2023-12-02
This is a great filter system. My wife has multiple chemical sensitivities and this filter works very well for her. It is also very easy to replace. I usually have a set in storage and when I change them out, I buy a new set, ready to go.
Michael Gerow |
2020-04-09
It would really be nice to actually find filter replacements, I have been all over everywhere and cannot find replacements, they are all out of stock. I depend on these for medical purposes, wish I had bought from a company that could replace items when needed. What a joke!!
2020-04-09
It would really be nice to actually find filter replacements, I have been all over everywhere and cannot find replacements, they are all out of stock. I depend on these for medical purposes, wish I had bought from a company that could replace items when needed. What a joke!!
Bart Zawacki |
2020-02-12
We have had this filtration installed for a year now. The faucet broke after about 15 months for which I would take off a half star if I could. But the filtration system works great. The water tastes great. We go through a lot of water in my household but still have not changed out the filters. In my experience, you will notice a decline in flow or a change in taste when filters need replaced and we havent noticed either of these. Highly recommend.Also, I did call the company after the faucet broke as I was reluctant to buy the same model as a replacement. They dont sell any other models for this system. Nick said I could use any air-gap faucet so I purchased one at lowes. It has 1/4 inch and 3/8 inch tubing attached to it and I honestly cannot figure out how it is supposed to be configured to this filtration system so Im returning it and going to buy the original model again. Keeping my fingers crossed that it last longer. I wish they sold it on Amazon as I could get it in 2 days versus 4 days. So guess Im off to buy bottled water to last this week.
2020-02-12
We have had this filtration installed for a year now. The faucet broke after about 15 months for which I would take off a half star if I could. But the filtration system works great. The water tastes great. We go through a lot of water in my household but still have not changed out the filters. In my experience, you will notice a decline in flow or a change in taste when filters need replaced and we havent noticed either of these. Highly recommend.Also, I did call the company after the faucet broke as I was reluctant to buy the same model as a replacement. They dont sell any other models for this system. Nick said I could use any air-gap faucet so I purchased one at lowes. It has 1/4 inch and 3/8 inch tubing attached to it and I honestly cannot figure out how it is supposed to be configured to this filtration system so Im returning it and going to buy the original model again. Keeping my fingers crossed that it last longer. I wish they sold it on Amazon as I could get it in 2 days versus 4 days. So guess Im off to buy bottled water to last this week.
Christopher Brown |
2020-01-23
The iSpring system works great, so glad we purchased it. Replacing the filters was easy. Would highly recommend it.
2020-01-23
The iSpring system works great, so glad we purchased it. Replacing the filters was easy. Would highly recommend it.
Walter Flynn |
2020-01-01
Highly recommend buying these. If you have a water softener and taste salt it means your system is not set up right, or it means you didnt give your new filter system enough time to break in and stabilize.The first 3 days to a week the water may have residual tastes to it as the filters shed the "fines". after the filters have have stabilized and are conditioned you have crystal clear great tasting water.
2020-01-01
Highly recommend buying these. If you have a water softener and taste salt it means your system is not set up right, or it means you didnt give your new filter system enough time to break in and stabilize.The first 3 days to a week the water may have residual tastes to it as the filters shed the "fines". after the filters have have stabilized and are conditioned you have crystal clear great tasting water.
iSpring US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment Carbon Carbon (Newest Version)$127.99
iSpring RCC7AK, NSF Certified 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH Remineralization RO Water Filter System Under Sink, Superb Taste Drinking Water Filter$215.99
iSpring WGB32B Whole House Water Filter System, Highly Reduces Sediment, Taste, Odor, and up to 99% Chlorine, 3-Stage w/ 20-Inch Sediment and Carbon Block Filters, 1" Inlet/Outlet$485.99
iSpring F5-CUA4 Replacement set, Fits CU-A4 Ultra Filtration 5-Filter Annual Replacement Pack$76.99
iSpring FP15Q Quick-Change 5 micron Sediment Filter, Fits CU-A4 Ultra Filtration System$32.99
iSpring FT15Q Quick-Change Inline Carbon Filter, Fits CU-A4$25.99
iSpring F3-CUA4 replacement set, Fits CU-A4 Ultra Filtration 3-piece Filter Pack for 6-month Supply$60.99
iSpring FUF1 Ultra Filtration UF Membrane, Fits CU-A4$42.99
iSpring WGB32BM Whole House Water Filter System, Reduces Iron, Manganese, Chlorine, Sediment, Taste, and Odor, 3-Stage Iron Filter Whole House$503.99
iSpring FKG15Q Quick-Change Inline KDF/Carbon Filter, Fits CU-A4 Ultra Filtration System$35.99
iSpring WSP Reusable Whole House Spin Down Sediment Water Filter, 1" MNPT 3/4" FNPT w/Push to Connect Fittings, Lead-Free Brass$61.99
iSpring RO500-BN NSF Certified Tankless RO Reverse Osmosis Water Filtration System, 500 GPD Fast Flow, Brushed Nickel Faucet, 2:1 Pure to Drain Ratio, White$563.99
Warranty Registration & Help Center
Tell us about your shopping experience
