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H2O International® US4-13
Under Sink Model Water Filter with 3/8" Quick-Connect Fittings

Model # H2O-US4-13  |  Part # US4-13

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.

Click here for this model with 3/8" Compression Fittings.

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 installs easily with 3/8 push in fittings or compression fittings if requested. 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 18 years. We have sold many thousands of them over the years with few issues. It continues to be one of our most popular models. 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.

  • Certified Water Specialists are on staff and available
  • Warranted for 3 years of maintenance free performance
  • Comes complete with tubing, fittings and instructions
  • Bacteriostatic: Prevents Bacteria Growth within the unit
  • 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 works.



Quick-Connect Guide:

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




H2O-US4-13
Model # H2O-US4-13
Part # US4-13
Click for larger image
$159.00 Add to Cart
Quantity:  
Units Ordered Individually
 Case Quantity: 6 Units

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an install diagram


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installation animation

NSF® Certified
NSF 55 Certified


Environmental Impact:

Water Bottle Landfill

Use our Bottled Water Cost Calculator to find out how much of an impact you have on the environment.

Learn why filtration is better for the environment than bottled water.

Bottled Water
vs Tap Water




Gear Icon Specifications

Max Capacity: 25,000 gallons Recommended Flow: 1 - 2 GPM
Dimensions: 14" (H) × 5" (D) Unit Shipping Weight: 8.2 lb



Addon Icon Add-Ons / Accessories / Replacement Cartridges & Parts

Model # Description Price
ICEKIT38 Refrigerator / Icemaker Connection Kit w/ 3/8" Tee
$11.00
Add To Cart