Hero image 0 of iSpring 4-Stage Under Sink Ultra-Filtration, 0.01 Micron, Removes 99.99% Contaminants, Quick Filter Change with Brushed Nickel Faucet, White, Model: CU-A4, 0 of 8
iSpring 4-Stage Under Sink Ultra-Filtration, 0.01 Micron, Removes 99.99% Contaminants, Quick Filter Change with Brushed Nickel Faucet, White, Model: CU-A4
Key item features
- Superior Performance: The advanced 4-stage design removes up to 99% of chlorine, lead, arsenic, and more, while retaining essential minerals.
- Ultra Filtration: Features a 4-stage system including PP Sediment, Ultra Filtration, KDF/GAC, and Fine Activated Carbon filters for comprehensive water purification.
- Tankless Design: No waste water and no storage tank required, providing effective filtration for sinks, refrigerators, coffee makers, and more.
- Premium Faucet: Comes with a brushed nickel finish drinking water faucet, ensuring both style and functionality.
- Easy Installation: Push-to-connect fittings with color-coded tubing simplify installation; twist-on/twist-off filter cartridges make replacements easy.
- High Capacity: Utilizes UF Hollow Fiber Technology to remove 99.99999% of bacteria and 99.9999% of protozoa, exceeding EPA guidelines.
- Versatile Use: Suitable for home, office, RV, and hotel installations, with a space-saving design and low pressure requirement.
Generated by AI
Specs
- Filtration stages4
- BrandiSpring
- Height5 in
- Rec. useResidential
- Weight5 lb
- ModelCU-A4
Current price is USD$148.65
Price when purchased online
- Free shipping
Free 30-day returns
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Arrives by Wed, Jul 1
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Sold and shipped by iSpring Water Systems, LLC
4.633928571428571 stars out of 5, based on 224 seller reviews(4.6)224 seller reviews
Free 30-day returns
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About this item
Product details
The iSpring CU-A4 0.01μm Ultra-Filtration Under Sink Water Filter System offers advanced 4-stage filtration with state-of-the-art UF Hollow Fiber Technology, removing up to 99.99% of contaminants including bacteria and protozoa. This tankless system features a compact design, low-pressure requirement, and a brushed nickel faucet, making it ideal for home, office, RV, or hotel use. Easy to install and maintain, the CU-A4 ensures superior water quality while retaining essential minerals, providing clean water for various needs without waste water or a storage tank.
- SUPERIOR PERFORMANCE: The advance 4-stage design, which includes both Ultrafiltration and KDF/GAC stages, removes up to 99% of chlorine and chlorine treatment by-products, lead, arsenic, and much more, while retaining minerals. Noted: This system is NOT a Reverse Osmosis water filtration system and does NOT lower TDS
- 4-Stage ULTRA FILTRATION SYSTEM: PP Sediment Filter ((5 microns) removes larger particles like rust, sand, dirt. ) Ultra Filtration Filter (contains hollow fiber membrane technology with a pore size of just 0.01 microns. ) KDF and GAC Filter (provides much better control of particularly problematic contaminants including chloramine, hydrogen sulfide, heavy metals, and other compounds). Fine Activated Carbon Filter (provides final polishing).
- SIMPLE AND FLEXIBLE: NO WASTE WATER and No storage water tank required. The CU-A4 provides highly effective water filtration for any number of clean water needs - at the sink, in the refrigerator, for coffee makers and more.
- FEATURES: Come with premium Brushed Nickel finish drinking water faucet. All filters, tubing and other water-contacting parts are manufactured to comply strictly with NSF/ANSI standards for safety and water quality.
- EASY-TO-INSTALL AND REPLACE FILTER: Push to connect fittings with color-coded tubing simplify the installation process. Filter replacement are designed for ease. No need to disconnect hoses or water lines. Just Twist On / Twist Off filter cartridges make changing filters a snap. Filter life: 6 -12 months, depending on your source water and usage.
info:
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Specifications
Under-sink & countertop filtration system type
Under-Sink Filtration System
Filtration stages
4
Brand
iSpring
Height
5 in
Warranty
Warranty information
1 year manufacturer warranty and lifetime tech support?
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
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Showing 1-3 of 44 reviews
Apr 13, 2023
lildreamer67
5 out of 5 stars review
Verified Purchase
Super easy to install
Easy to install. My biggest issue with our city water is how strong the smell of chlorine is. That is no longer an issue after installing this filter system.
Helpful?34X1550I5VQV187946590
Aug 29, 2025
Snowbaby76
5 out of 5 stars review
Great Value and Quality
Sean was really helpful and responsive to an inquiry. System came quickly. Water quality is great! My family is enjoying this product and we are looking to purchase an additional unit for the farm. Thanks ISpring!
Review from iSpring Water Systems
Helpful?34X1550I5VQV187946590
Sep 14, 2024
tk
5 out of 5 stars review
Verified Purchase
Good Buy
Was easy to replace another brand that was discontinued with this one . Makes the water taste good! No film on the coffee in the cup!
Incentivized Review
Helpful?34X1550I5VQV187946590
