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We take pride in each and every project.


REsys supports a wide variety of industries.  Our goal is simple, to match the customer's needs with a reliable and cost effective solution.  Our unique ability to manufacture custom equipment and support ongoing needs gives us a distinct advantage.

our start


REsys Inc. was started in 1986 by Nelson Maheu.  It began in the basement.  Through hard work, guts and determination the business grew and moved into a small industry park in Salem, Oregon.  During his time, Nelson forged the basic principles the REsys still operates under.  In 1996, REsys moved to its current location, supporting a 15,000 ft.2 facility.  In 2002, REsys changed hands to the sons, Michael and Brian.  Together the business continues to grow and diversify to support a variety of water purification applications.



Here's some of the systems we manufacture:

  • Single Pass DI Water
  • Recirculating DI Water
  • Reverse Osmosis
  • Reverse Osmosis / DI Water
  • Lab Reverse Osmosis / DI Water
  • Zero Discharge Closed Loop Water Recycling (PCB).
  • pH Neutralization
  • Degas
  • Pumping Stations
  • Heat Recovery
  • DI Water in-line heaters

Here some of the Services we provide:

  • Carbon Rebed
  • Ion Exchange Regeneration
  • Portable Ion Exchange
  • Semiconductor Grade Regeneration
  • System support
  • Maintenance and repairs of DI Water Systems

innovative water purification systems

Reverse Osmosis, Deionized Water, Carbon, and DI Water Heating