Collection: Water Filtration

Clean, great-tasting water starts here. USA Filtration designs and manufactures water filters in the USA, and many of our systems are direct replacements for discontinued NSA* models. Whether you want filtered drinking water at the kitchen sink, a chlorine-free shower or filtered water at every tap, there's a system for your home.

Find the right water filter

• USA-100 under sink water filter: hidden under the counter and connected to your existing faucet. 5-stage GAC/KDF filtration, 25,000-gallon capacity. Replaces the NSA 100S* and 100SX*.
• USA-50 countertop water filter: sits next to the sink and connects to your faucet in minutes, with no tools or plumbing changes. Great for renters. Replaces the NSA 50C*.
• USA-25 ice maker and appliance filter: installs inline to your refrigerator or ice maker. 3,000-gallon capacity. Replaces the NSA 25I*.
• USA-75 shower head water filter: KDF filtration that reduces chlorine in your shower, lasting up to 7,500 gallons (about 6 months).
• USA-300 whole house water filter: filters every tap in your home, treating up to 75,000 gallons (about 1 year).

Already have a system? Shop replacement filters. Upgrading from an old NSA unit? See our NSA water filter replacement guide.

*NSA is a trademark of its respective owner. USA Filtration is not affiliated with NSA.