NSA 50C Replacement: The USA-50 Countertop Filter

The NSA 50C was a popular countertop water filter, but it has been discontinued. If yours has reached the end of its life, the made-in-USA USA-50 Countertop Water Filter is our replacement, and it filters 2 times the amount of water the NSA 50C did.

How the USA-50 compares

  • 10,000-gallon capacity, 2 times the amount of the old NSA 50C
  • 5-stage filtration and purification with bacteriostatic GAC/KDF media
  • Bacteria protection for up to 36 months
  • Improves taste and color and eliminates odors, and reduces hundreds of contaminants (see GAC key)
  • Installs in minutes without tools and fits all standard faucets, with adapters included
  • Compact, light and sealed construction
  • Made in the U.S.A. with a 60-day full replacement and 1-year pro-rata warranty

Why choose a countertop filter?

A countertop filter needs no plumbing. It sits next to your sink and connects to your faucet with a diverter, so you can switch between filtered and regular water. That makes it a great fit for renters, small kitchens, and anyone who doesn't want to install a filter under the sink.

How to set up the USA-50

  1. Unscrew the aerator from the end of your kitchen faucet.
  2. Attach the diverter to your faucet, using one of the included adapters if needed.
  3. Connect the tubing from the diverter to the USA-50 and set the filter on your counter.
  4. Turn on the cold water, switch the diverter to filtered, and run water for a few minutes before drinking.

Need a new diverter? The USA-50 diverter valve is sold separately.

When to replace it

Replace the USA-50 after 10,000 gallons or 36 months, whichever comes first.

Looking for a different NSA replacement?

Shop the USA-50 Countertop Water Filter

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

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