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: the USA-100 replaces the NSA 100S and 100SX under sink filters, the USA-50 replaces the NSA 50C countertop filter, and the USA-25 replaces the NSA 25I appliance and ice maker filter. *NSA is a trademark of its respective owner; USA Filtration is not affiliated with NSA.