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About Us

WM Filter is a family-owned business established in 1989 based in Naples, Florida, and Rockville, Maryland.  We pride ourselves on excellent customer service while offering clean, good, and pure drinking water and environmentally friendly air products. 
All of the Water Marque water filters are made in the USA and have NSF-certified components.  Please be advised we do sell items that are not manufactured in the USA.
WM Filter is the ONLY authorized and trusted company for NSA replacement products.

Effective January 1, 2008 NSA Inc. officially turned over the Air and Water replacement program to WM Filter (Water Marque). 

NSA  Inc. has 25 year plus relationship with WM Filter (Water Marque).

 All NSA Air and Water replacement products can be ordered through WM Filter at 1-800-959-0708.  All of the Water Marque water filters are made in the USA. 

Contact Information: 
WM Filter LLC

Toll Free:  1-800-959-0708 

Local:  239-643-4083 
Fax: 239-643-6707 
Website:  http://www.wmfilter.com
Email: [email protected]
Technical Support E-Mail: [email protected]