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Nathan Olszak

  With over 30 years of hands-on experience in the water treatment industry, Nathan Olszak is a trusted water treatment expert. He specializes in designing, engineering, and servicing water treatment systems. As the owner of Complete Water Solutions, Osmonics, and Membrane Cleaning Pro, Nathan has built a reputation for delivering customized water treatment solutions that enhance efficiency, reliability, and water quality across various industries, including the medical, commercial, and manufacturing sectors. Nathan’s journey in water treatment began as a service technician. He gained in-depth knowledge by working with all major brands of equipment, including Veolia, Suez, Bruner, Culligan, Pentair, Aquamatic, Osmonics, GE Water, Marlo, Lakeside, Fleck, Autotrol, US Filter, ION Pure, Siemens, Evoqua, and many others. This hands-on expertise, combined with his technical certifications, has made him a leader in water system engineering and water management.

Credentials & Expertise

  • Certifications: David H. Paul Reverse Osmosis Certification, PLC Programming
  • License: Power Plant Operating Engineer 3rd Class
  • Specialties:
  • Design & engineering of water treatment systems and advanced water systems
  • Custom water filtration systems and solutions
  • Installation, automation, and repair of water treatment systems
  • Expertise in Reverse Osmosis (RO), Deionization, Water Softening, Carbon Filtration, Iron Filtration, UV Treatment, Ultrafiltration (UF), Process Filtration, CEDI/EDI, and more
  • Specialized knowledge in Boiler Feed Water, Tower Makeup Water, and drinking water production for industries such as bottling, pharmaceuticals, and food processing
  • Project management and reclaiming of water system waste for other uses
  • Evaluation of raw water sources and potential contamination risks
  • Industrial water treatment strategies to prevent corrosion and optimize system performance
  • Boiler water treatment to enhance energy efficiency and system longevity
Nathan’s commitment to excellence extends beyond equipment sales and service. He works closely with clients to develop tailored water treatment services that optimize performance and meet their operations' unique demands. His expertise covers methods that mitigate water impurities, ensure fresh water accessibility, and maintain regulatory compliance. It also includes the design of high-efficiency reverse osmosis systems for industrial use. Nathan focuses on the latest technology in water conditioning, water softeners, filters, and pumps to improve maintenance and efficiency. His experience in laboratory testing and biofilm control ensures the highest industry standards in water treatment processes and water management.  Additionally, his deep understanding of infrastructure and water data analysis provides long-term, cost-effective solutions that promote health and safety. His expertise ensures that businesses receive top-tier, quality water treatment solutions. For insights into the latest industry trends, innovations, and best practices, explore the Complete Water Solutions Blog, where Nathan shares valuable information on water filtration systems, sustainability, and water solutions engineering.   Give Us A Call (855) 787-4200 or Email info@complete-water.com

Sea Water Reverse Osmosis Service & Training

May 29, 2021 · By Nathan Olszak

Complete Water Solutions was recently awarded a contract to help provide support services and training for a drinking water Reverse Osmosis Plant on a remote island in the Pacific. This island is located over +6,500 miles away from our corporate office in Twin Lakes WI. The water treatment plant on the island is vital to […]

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Tina Promoted To Service Coordinator

May 15, 2021 · By Nathan Olszak
Complete Water Solutions is pleased to announce that Tina Snow has been promoted to Service Coordinator. Over the past few years Complete Water Solutions has seen an increased demand for our technical services. With this increased demand there was the need for someone to help coordinate it all and help keep our customers informed. Tina's [...]
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Tonkaflo Pump Maintenance & Lead Times

April 29, 2021 · By Nathan Olszak
Complete Water Solutions reviewed some common questions we get regarding Tonkaflo Pumps.  Tonkaflo pumps have been around for over 30+ years and remain a work horse of the Reverse Osmosis Industry. Tonkaflo pumps are used in a wide variety of applications. The main application Complete Water Solutions uses Tonkaflo Pumps is Reverse Osmosis (RO) water [...]
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Replace Industrial Softener System

April 8, 2021 · By Nathan Olszak
Complete Water can replace an industrial softener system! Fleck 3900 Side Mount 165 GPM Softener System Complete Water Solutions was recently awarded a project to replace a twin fleck 3900 side-mounted softener system. The system specs: (2) 42" Diameter x 72" Tall Fiberglass Media Tanks - 150 PSI Rated (Pentair) (2) Fleck 3900 Valves w/ [...]
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Continuous Electronic Deionizatio – What is inside?

March 4, 2021 · By Nathan Olszak
Continuous Electronic Deionization Stack This week we took a look at what is inside a Continuous Electronic Deionization Stack. Continuous Electronic Deionization is also known as CEDI or EDI. CEDI is commonly used in high purity water applications such as, pharmaceutical water, power plant water make up, plating industries, labs and semiconductor. CEDI is typically [...]
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Osmonics Beverage Nano Filtration (NF) 1233033 – Membrane Change Out

February 25, 2021 · By Nathan Olszak
Membrane Change Out Complete Water Solutions recently changed out Nano Filtration Membranes on an Osmonics Beverage Nano Filtration Unit. The system was experiencing high conductivity. During the change-out service plastic pieces/debris were found in the RO membranes. Upon future investigation, it was noted that the pump had broken impellers that caused the plastic shards to [...]
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1200 GPM Industrial Water Softener Replacement

February 18, 2021 · By Nathan Olszak
CWT-3000-4” Triplex Industrial Softener System Replacement (400 GPM Softener System) Complete Water Solutions supplied a triple tank softener system. The Industrial Water Softener comprised of (3) 72” Diameter x 72” Tall side shell. Each vessel was epoxy lined interior and polyurethane exterior coating. The reason the exterior coating was selected is to help with exterior [...]
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Softener Using Too Much Salt? Industrial Softener Resin Replacement

February 11, 2021 · By Nathan Olszak
Do you think your industrial water softener is using too much salt? Complete Water Solutions can help! Take a look below at one example where we helped our clients. Complete Water Solutions performed a resin rebed recently on a triplex industrial softener. What prompted this rebed was the increased salt and water usage due to [...]
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Osmonics Reverse Osmosis E8 Lakewood Controller Replacement

February 4, 2021 · By Nathan Olszak
  E8 Lakewood Controller Replacement Osmonics RO Systems from about the mid 90's and earlier were equipped with Lakewood Controllers and Allen Bradley Micrologix 1000 PLC Systems. These products have been obsolete for years and parts to repair them are scarce to non existent. Complete Water Solutions offers 2 options to upgrade the Osmonics Lakewood [...]
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Osmonics E8 Lakewood 2450 Controller Upgrade Lakewood Replacement

January 28, 2021 · By Nathan Olszak
Complete Water Solutions is an expert in RO Systems and when it comes to Osmonics branded Reverse Osmosis Systems, we have extensive knowledge in operations, controllers, and Tonkaflo pumps. Since before the Mid 2000’s, Osmonics was using a combination of the Lakewood 2450 Controller and Allen-Bradley Micrologix 1000. Since then, both the Lakewood 2450 Controller [...]
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President Of Complete Water Solutions Helps Fight Covid-19

January 24, 2021 · By Nathan Olszak
Emily Olszak President of Complete Water Solutions announced during the annual meeting that she would be taking a temporary leave (a few days a week) to help administer covid-19 vaccinations (volunteering). Emily’s career prior to Complete Water Solutions spanned over a decade as a Registered Nurse. Emily is grateful for the opportunity to volunteer to [...]
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