Hero image 0 of iSpring 4-Stage Ultra Filtration Under Sink Water System, 0.01-Micron, Removes 99.99% Contaminants, Quick Filter Change with Brushed Nickel Faucet, w/Extra Replacement Filter Set (Model: CU-A4), 0 of 10
iSpring 4-Stage Ultra Filtration Under Sink Water System, 0.01-Micron, Removes 99.99% Contaminants, Quick Filter Change with Brushed Nickel Faucet, w/Extra Replacement Filter Set (Model: CU-A4)
(No ratings yet)
Key item features
- Advanced 4-Stage Filtration: The iSpring CU-A4 effectively reduces chlorine, lead, heavy metals, VOCs, and harmful contaminants, delivering clean and safe drinking water straight from your tap.
- Improved Taste & Odor: Enjoy fresh, crisp water by removing unpleasant taste, chlorine smell, and chemical residues, making it ideal for cooking, beverages, and direct consumption.
- Compact & Easy to Install: Designed for under sink use, the CU-A4’s space-saving build fits neatly in kitchens, apartments, or RVs. DIY-friendly installation requires no plumbing experience.
- Durable & Reliable Performance: Constructed with high-quality materials, the CU-A4 ensures consistent filtration and dependable long-term use, providing better water at your convenience.
- Includes Replacement Filters (F4-CUA4): Bundle comes with a complete filter set for up to 1 year of use, ensuring continuous fresh water without the hassle of frequent reorders.
Specs
- Filtration stages4
- BrandiSpring
- Rec. useResidential
- ModelCU-A4F4
More seller options (1)
Starting from $314.99
Similar items you might like
Based on what customers bought
iSpring F9RO5004FAK 2-Year Replacement Filter Pack for RO5004F-AK Tankless Reverse Osmosis System $321.99
$32199current price $321.99iSpring F9RO5004FAK 2-Year Replacement Filter Pack for RO5004F-AK Tankless Reverse Osmosis System
iSpring 3-Stage Under Sink Tankless Water Filtration System, Bacteria and Viruses Removal, w/ Up to 1-Year Replacement Filter Set & Fridge Connection Kit (Model: US31-BV) $269.99
$26999current price $269.99iSpring 3-Stage Under Sink Tankless Water Filtration System, Bacteria and Viruses Removal, w/ Up to 1-Year Replacement Filter Set & Fridge Connection Kit (Model: US31-BV)
Aquasana Under Sink Water Filter | 3-Stage Max Flow Claryum Filtration | WQA Certified to Reduce PFAS, Lead & Chlorine | Under Counter Drinking Water Filter | Brushed Nickel Faucet | AQ-6300M-BN $224.99
5 optionsAvailable in additional 5 options$22499current price $224.99Aquasana Under Sink Water Filter | 3-Stage Max Flow Claryum Filtration | WQA Certified to Reduce PFAS, Lead & Chlorine | Under Counter Drinking Water Filter | Brushed Nickel Faucet | AQ-6300M-BN
144.5 out of 5 Stars. 14 reviewsiSpring US31-PF 3-Stage Under Sink Water Filtration System, SGS-Tested to Reduces up to 99% PFOA & PFOS, 3-Stage Filtration Reduces Sediment, Chlorine, Taste & Odor, 2.5" x 10" $153.89 Was $231.93
$15389current price $153.89, Was $231.93$231.93iSpring US31-PF 3-Stage Under Sink Water Filtration System, SGS-Tested to Reduces up to 99% PFOA & PFOS, 3-Stage Filtration Reduces Sediment, Chlorine, Taste & Odor, 2.5" x 10"
94.9 out of 5 Stars. 9 reviewsBest seller DREO Reverse Osmosis Water Filter Countertop, 7-Stage RO Water Filtration System, Installation-Free, Reduce TDS, Water Filter Pitcher for Home, Kitchen, 3:1 Pure to Drain, WF511 Upgraded $299.99 Was $359.99
Best seller
$29999current price $299.99, Was $359.99$359.99DREO Reverse Osmosis Water Filter Countertop, 7-Stage RO Water Filtration System, Installation-Free, Reduce TDS, Water Filter Pitcher for Home, Kitchen, 3:1 Pure to Drain, WF511 Upgraded
23 out of 5 Stars. 2 reviewsBrondell Coral UC300 Three-Stage Undercounter Water Filtration System with Designer Chrome Faucet - Quick Change Filter, WQA Gold Seal-Certified $149.99
2 optionsAvailable in additional 2 options$14999current price $149.99Brondell Coral UC300 Three-Stage Undercounter Water Filtration System with Designer Chrome Faucet - Quick Change Filter, WQA Gold Seal-Certified
4394.7 out of 5 Stars. 439 reviewsBest seller Brita Hub Countertop Water Filtration Device, Water Dispenser, 12 Cup Reservoir, Includes 6-Month Filter, White $194.95 Was $194.95
Best seller
$19495current price $194.95, Was $194.95$194.95Brita Hub Countertop Water Filtration Device, Water Dispenser, 12 Cup Reservoir, Includes 6-Month Filter, White
2854.4 out of 5 Stars. 285 reviewsBest seller Waterdrop N1 Countertop Reverse Osmosis Water Filter System, TDS Reduction, 4-Stage Water Filter,Automatic Flushing, 3:1 Pure to Drain, UV Sterilization $249.00
Best seller
3 optionsAvailable in additional 3 options$24900current price $249.00Waterdrop N1 Countertop Reverse Osmosis Water Filter System, TDS Reduction, 4-Stage Water Filter,Automatic Flushing, 3:1 Pure to Drain, UV Sterilization
994.1 out of 5 Stars. 99 reviewsAquasana SmartFlow® Reverse Osmosis Water Filter System - Brushed Nickel Faucet $239.99
$23999current price $239.99Aquasana SmartFlow® Reverse Osmosis Water Filter System - Brushed Nickel Faucet
154.5 out of 5 Stars. 15 reviewsAquasana Max Flow Under Sink Water Filter System - Brushed Nickel - AQ-5300 .55 $191.24 Was $239.99
3 optionsAvailable in additional 3 options$19124current price $191.24, Was $239.99$239.99Aquasana Max Flow Under Sink Water Filter System - Brushed Nickel - AQ-5300 .55
14834.3 out of 5 Stars. 1483 reviewsiSpring Whole House Water Filter System, SGS-Tested to Remove up to 99% PFAS, 2-Stage Filtration Reduces Sediment, Chlorine, Chemical, Taste & Odor, 10-Inch Filters, 1" Inlet/Outlet Model: WGB21B-PF $294.30 Was $326.99
$29430current price $294.30, Was $326.99$326.99iSpring Whole House Water Filter System, SGS-Tested to Remove up to 99% PFAS, 2-Stage Filtration Reduces Sediment, Chlorine, Chemical, Taste & Odor, 10-Inch Filters, 1" Inlet/Outlet Model: WGB21B-PF
Waterdrop G5P700A Alkaline Mineral pH Reverse Osmosis System, 700GPD RO Water Filter, 8 Stage Filtration, NSF/ANSI 372 Certified, 2:1 Pure to Drain, Smart LED Faucet, with Extra Filter $399.99
$39999current price $399.99Waterdrop G5P700A Alkaline Mineral pH Reverse Osmosis System, 700GPD RO Water Filter, 8 Stage Filtration, NSF/ANSI 372 Certified, 2:1 Pure to Drain, Smart LED Faucet, with Extra Filter
iSpring FWSP500ARJ Spin Down Sediment Filter Replacement Cartridge, 500 Micron $69.83
$6983current price $69.83iSpring FWSP500ARJ Spin Down Sediment Filter Replacement Cartridge, 500 Micron
iSpring WGB21B-PFKS Whole House Water Filter System, SGS-Tested to Reduce Up to 99% PFAS, 2-Stage Filtration Removes Sediment, Heavy Metals, Chlorine, Chemical, Taste & Odor,10” x 4.5” Filters, $306.84 Was $360.99
$30684current price $306.84, Was $360.99$360.99iSpring WGB21B-PFKS Whole House Water Filter System, SGS-Tested to Reduce Up to 99% PFAS, 2-Stage Filtration Removes Sediment, Heavy Metals, Chlorine, Chemical, Taste & Odor,10” x 4.5” Filters,
Aquasana Clean Water Machine - Countertop Water Filter System - AQ-CWM2-B $199.99
$19999current price $199.99Aquasana Clean Water Machine - Countertop Water Filter System - AQ-CWM2-B
4434.2 out of 5 Stars. 443 reviewsAquasana Replacement Filter Cartridges | Fit Claryum 3-Stage Under Sink Water Filter | WQA Certified to Reduce Up to 99.99% of PFAS, Microplastics, Lead & Chlorine | 3 Count | AQ-C3-R $83.99 $279.97/g
$8399current price $83.99$279.97/gAquasana Replacement Filter Cartridges | Fit Claryum 3-Stage Under Sink Water Filter | WQA Certified to Reduce Up to 99.99% of PFAS, Microplastics, Lead & Chlorine | 3 Count | AQ-C3-R
10904.4 out of 5 Stars. 1090 reviewsAquasana SmartFlow® Reverse Osmosis Water Filter System - Oil Rubbed Bronze Faucet $239.99 Was $479.99
$23999current price $239.99, Was $479.99$479.99Aquasana SmartFlow® Reverse Osmosis Water Filter System - Oil Rubbed Bronze Faucet
94.7 out of 5 Stars. 9 reviewsVonWater 800GPD Tankless Reverse Osmosis Water Filter System, 2:1 Pure to Drain Under Sink RO Water Filtration System with Extra RO, PPC Filter $219.00
$21900current price $219.00VonWater 800GPD Tankless Reverse Osmosis Water Filter System, 2:1 Pure to Drain Under Sink RO Water Filtration System with Extra RO, PPC Filter
15 out of 5 Stars. 1 reviewsMOEN F9800 Single-Stage Under Sink Advanced Water Filtration System $176.83
$17683current price $176.83MOEN F9800 Single-Stage Under Sink Advanced Water Filtration System
164.3 out of 5 Stars. 16 reviewsAquasana 2-Stage Under Sink Water Filter System - Nickel - AQ-5200.55 $124.99
3 optionsAvailable in additional 3 options$12499current price $124.99Aquasana 2-Stage Under Sink Water Filter System - Nickel - AQ-5200.55
6954.4 out of 5 Stars. 695 reviews
About this item
Product details
The iSpring CU-A4 is a compact and efficient 4-stage under sink water filtration system that delivers clean, great-tasting drinking water right from your faucet. Its advanced multi-layer design reduces chlorine, lead, heavy metals, VOCs, and other harmful contaminants, while improving taste and removing unpleasant odors. Perfect for households, apartments, condos, or RVs, the CU-A4 is easy to install without the need for a plumber. This bundle also includes the F4-CUA4 replacement filter set, providing up to 1 year of extended use. With fresh filters on hand, you can enjoy uninterrupted access to healthier, better-tasting water at home.
- Advanced 4-Stage Filtration: The iSpring CU-A4 effectively reduces chlorine, lead, heavy metals, VOCs, and harmful contaminants, delivering clean and safe drinking water straight from your tap.
- Improved Taste & Odor: Enjoy fresh, crisp water by removing unpleasant taste, chlorine smell, and chemical residues, making it ideal for cooking, beverages, and direct consumption.
- Compact & Easy to Install: Designed for under sink use, the CU-A4’s space-saving build fits neatly in kitchens, apartments, or RVs. DIY-friendly installation requires no plumbing experience.
- Durable & Reliable Performance: Constructed with high-quality materials, the CU-A4 ensures consistent filtration and dependable long-term use, providing better water at your convenience.
- Includes Replacement Filters (F4-CUA4): Bundle comes with a complete filter set for up to 1 year of use, ensuring continuous fresh water without the hassle of frequent reorders.
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.
Specifications
Under-sink & countertop filtration system type
Under-Sink Filtration System
Filtration stages
4
Brand
iSpring
Items included
F4-CUA4 replacement filter set
Warranty
Warranty information
1-year limited warranty
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Warnings
State Chemical Disclosure
N/A
Customer ratings & reviews
0 ratings|0 reviews
This item does not have any reviews yet
