iSpring CU-A4 Ultra-Filtration Under Sink Water Filter

Enjoy cleaner, fresher water right from your tap with this easy-to-install under sink filter

Product Price

$222.99 $158.99

Product Review Score

4.38 out of 5 stars

111 reviews

Product Summary

The iSpring CU-A4 Ultra-Filtration Under Sink Water Filter gives you clean, great-tasting water right from your tap without the hassle of bulky systems. It’s super easy to install and maintain, making it a fantastic choice for anyone wanting fresher water at home.

We found the best options for you

Loading...

When you order through these links, we may earn a commission at no additional cost to you.

Additional Product Details

  • The iSpring CU-A4 delivers top-notch filtration with its advanced 4-stage design
  • Removes up to 99% of chlorine, lead, and other harmful contaminants while keeping essential minerals
  • Its 4-stage ultrafiltration system effectively tackles larger particles like rust and dirt
  • Features a powerful ultrafiltration membrane with a tiny pore size of just 0.01 microns
  • KDF and GAC filters target tough contaminants, including chloramine and heavy metals
  • Includes a fine activated carbon filter for that final touch of clean
  • No wasted water, no storage tank needed—perfect for any situation, from sinks to fridges
  • Comes with a sleek brushed nickel finish faucet that adds style to your kitchen
  • All components meet strict NSF/ANSI standards for safety and quality
  • Installation is a breeze with push-to-connect fittings, and changing filters couldn't be easier
  • Twist on and twist off filter cartridges make replacements quick and hassle-free
  • Filters last between 6 to 12 months, depending on your water quality and usage

Our Policies

Secure Checkout
Guaranteed safe & secure
Fast Shipping
Fast shipping to your doorstep
Waterdrop G5P500 Reverse Osmosis Water Filter, NSF/ANSI 58 & 372 Certified, 7 Stage Reverse Osmosis System, 500G RO Water Filtration System, 2:1 Pure to Drain, Reduces TDS PFAS, BPA Free

Waterdrop G5P500 Reverse Osmosis Water Filter, NSF...

Product Review Score

4.95 out of 5 stars

78 reviews

$249.99 $199.99

Waterdrop G3P800 Reverse Osmosis System, 800 GPD Fast Flow, NSF/ANSI 42 & 53 & 58 & 372 Certified, 3:1 Pure to Drain, Tankless Under Sink RO Water Filter System, LED Purifier, Smart Faucet

Waterdrop G3P800 Reverse Osmosis System, 800 GPD F...

Product Review Score

4.88 out of 5 stars

224 reviews

$999.00 $759.00

Express Water Reverse Osmosis Alkaline Water Filtration System – 10 Stage RO Water Filter with Faucet and Tank – Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 50 GPD

Express Water Reverse Osmosis Alkaline Water Filtr...

Product Review Score

4.13 out of 5 stars

95 reviews

$209.99

TOKIT U2 Reverse Osmosis System, Tankless Alkaline Mineral Reverse Osmosis Water Filter, NSF/ANSI 58,Under Sink Water Filter RO System, 600 GPD, 2:1 Pure to Drain, 2 Way Faucet

TOKIT U2 Reverse Osmosis System, Tankless Alkaline...

Product Review Score

4.39 out of 5 stars

61 reviews

$89.99 $79.99