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Customer Service

Nelsen Corporation has the best sales team assembled in the industry.

Custom Built

With the best products the industry has to offer, Nelsen custom builds every water conditioner to your exact specifications!

Featured Products

Nelsen 2510 & 5600
AIO Systems

Remove Iron & Sulfur
through oxidation.

Commercial NRO
2540 Series Systems

RO Systems Utilizing
25x40 Membranes

Enpress PIONEER Lead Removal System

POE filter removes BOTH forms of lead contamination

NWS AIO Systems

AIO Systems with Control Flow Technology

Nelsen Filtration Cartridge Systems

Featuring the One™ Water Filtration Simplified cartridge tank

NRO4 & NRO5
RO Systems

4-Stage and 5-Stage
50 gpd RO Systems

NWS Ultraviolet Systems

UV system with Luminor next generation controller and LIGHTLOCK technology.

About Nelsen Corporation

Nelsen Corporation is a wholesale manufacturer, OEM, and distributor of residential and commercial water treatment systems, components, and drinking water products to professional water treatment dealers. From the headquarters in Medina, Ohio, and additional distribution and manufacturing facilities in Arizona, Texas, and Florida, Nelsen serves professional dealers in the United States and throughout the world with the best the industry has to offer from Clack, Fleck, Structural, and Enpress and over 200 other vendors. Nelsen custom builds every water conditioner to your exact specifications - and we ship the same day you place your order.