The H2O International US4-13 under-sink water filter replaces and retrofits the discontinued NSA 100S and is an excellent replacement for the now discontinued NSA 100SX. The US4-13 uses the same size tubing and fittings as both NSA models.
This system connects to your existing sink faucet and flows up to 2 gallons per minute. The filter will remove chlorine, bad taste, odor, lead, and trace chemical contaminants from your family’s water.
Our company has been offering this model for over 20 years, and thousands of happy customers use it. It’s our most popular under-sink filter!
Your Family will Benefit from Healthy, Clean Water
Great Tasting Water, Coffee & Tea
Healthy Water for Cooking
Endless Supply of Water
Never Runs Out
Never Runs Out
Pure Water for Ice
Improve Pet Health with Filtered Water
Save Money over Bottled Water
Features of the
H2O International US4-13 Under-sink Water Filter:
- Removes Chlorine, Bad Taste, Odor and Lead
- Removes Dirt, Rust & Sediment
- Bacteriostatic KDF Media Prevents Bacteria Growth within the Unit
- Includes Tubing, Fittings and Instructions
- 3 Years of Maintenance-free Performance
- Made in the U.S.A.
View a cutaway diagram of typical under sink filter to see how it filters your water.
