Collection: NSA Replacement Filters

Still using an NSA* water filter? NSA models were discontinued, but you can keep enjoying clean water with our made-in-USA replacements. Our filters use the same style of compression connections NSA used, so switching over is simple.

NSA replacement chart

• NSA 100S* and 100SX* under sink filter → USA-100 Under Sink Water Filter (25,000-gallon capacity)
• NSA 50C* countertop filter → USA-50 Countertop Water Filter
• NSA 25I* appliance and ice maker filter → USA-25 Ice Maker & Appliance Water Filter (3,000-gallon capacity)

Not sure which model you have?

Check the model number on your old unit, then read our NSA Water Filter Replacement Guide. For model-by-model details, see NSA 100S and 100SX replacement, NSA 50C replacement and NSA 25I replacement. Still unsure? Call us at 888-672-3458 and we'll help you find the right filter.

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