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H2O International US4-13 Under Sink Water Filter

List Price: $219.00
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$60.00 (27%)
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Filtered Water Benefits the Whole Family

Quick-Connect Guide:

Quick-Connect FittingsTubing connection has never been easier than with Quick-Connect fittings. View our simplified Quick-Connect diagrams to see how...

Environmental Impact

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Bottled Water vs Tap Water

The H2O US4-13 under sink filter replaces and is a perfect retro fit for the discontinued NSA 100S. This model is also an excellent replacement for the now discontinued NSA 100SX. The US4-13 uses the same size tubing and the fittings as both the NSA models.

This system connects inline with your existing sink faucet and flows @ 2 gallons per minute, so there is usually no change in flow. The filter will remove chlorine, bad taste and odor from your family's water. The US4-13 also removes lead and does a better job of chemical contaminant removal than a system that uses carbon only, such as the now discontinued NSA models.

Utilizing Granular Activated Carbon and patented KDF media, this unit is bacteriostatic, meaning it will inhibit bacteria growth from within the unit. KDF also enhances the carbon's ability to remove chemical contaminants by removing most of the Chlorine from the water before the water contacts the carbon. With the carbon not burdened with chlorine removal, it can perform higher levels of filtration such as chemical contaminant reduction.

Use the H2O US4-13 for all kitchen water needs including drinking water, ice, juice concentrates, coffee, tea, cooking, pets, plants and more. Available at a fraction of the cost of bottled water, this easy to install under sink system connects by using 3/8 push in fittings. The time tested system produces 25,000 gallons of chlorine-free, quality drinking water before a replacement is needed.

Our company has been offering this model for 22 years. We have sold many thousands of them over the years and it is our most popular under sink filter. This time tested system will produce 25,000 gallons of chlorine-free, quality drinking water before replacement is needed. It is warranted and designed to provide 3 years of service for your family's needs.


  • Removes Chlorine, Taste, Odor and Lead
  • Removes Dirt, Rust & Sediment
  • Comes complete with tubing, fittings and instructions
  • Bacteriostatic: Prevents Bacteria Growth within the unit
  • Warranted for 3 years of maintenance free performance
  • Intended for use on municipally treated water
  • Do not use on microbiologically unsafe water supplies
  • Made in the U.S.A.

Under Sink Cutaway Diagram

View a cutaway diagram of typical under sink filter to see how it filters your water.
H2O-US4-13 Specifications
Max Capacity: 25,000 gallons Recommended Flow: 1 - 2 GPM
Dimensions: 14" (H) × 5" (D) Unit Shipping Weight: 8.2 lb