Driven by Water

Inspired by technology.

Driven by water.

Chandler Systems is a premier manufacturer of residential and commercial water treatment products. CSI is based in Ashland, Ohio, but our products and services extend to the far reaches of the country.

Chandler Systems succeeds by delivering outstanding performance while always striving to exceed our best. We believe in service beyond expectation, achieved through a constant desire to fulfill evolving customer needs. The honesty, intelligence and commitment of our people are vital to Chandler Systems’ success. We share pride in the company and respect each individual’s contribution at every level.


With over 35 years in the industry, Chandler Systems is a premier manufacturer of water treatment products, holding over 40 patents in water treatment, motor control, and electronic systems. Our founder, Bill Chandler, started manufacturing water treatment products in 1980, and in 1993, began production of electrical and electronic products.

In 2012, we combined these areas of expertise as we began to develop a virtual schematics and wireless control system, designed to help homeowners and contractors alike diagnose and solve the problems associated with leaks and other water usage issues. This private network would create a unified system to control filters, softeners, well pump controls, and more, and eventually became known as DROP.

Bill’s sons, Will and Ryan, have been part of the business for many years. They are committed to continuing to look at innovative ways to meet residential and commercial water treatment needs.



  • Water Soft, Inc. was founded by brothers Jim and Bill Chandler of Ashland, Ohio.
  • On February 29, 1980, Water Soft purchased the entire water treatment division of the F.E. Myers Pump Company.
  • Included in the purchase was a license for Water Soft to use the “Myers” name for a period of three years. If ever you see a product or literature in the field with both names present, it was manufactured prior to 1983.
  • Jim & Bill reinvested a large portion of the company’s income to research and development. The result was the creation of several patented/proprietary products including the WATER SPRITE/SINK TANK Water Filter and the PROVECTR Water Treatment System. These are all innovative in that they solve tough water problems without the use of costly chemicals. Another special product was the SOFT’N FILTER system that combines the filtration and softening process into one complete unit.


  • On March 2, 1988, Water Soft was purchased by Amtrol Inc. Over 30 years prior to the purchase of Water Soft, Amtrol introduced the first pre-pressurized diaphragm expansion tank to the water systems industry. At that time Amtrol was the leading manufacturer of water systems tanks in the world and was looking to enter into water treatment.
  • Eventually both Jim and Bill Chandler moved on to pursue other opportunities and Amtrol moved Water Soft out of the Ashland facility.


  • In 1993 Bill Chandler founded Chandler Systems Inc., a new venture focusing on the manufacture of electrical control systems for the water & wastewater markets.


  • On September 1, 1995, Bill Chandler formally began CSI Water Treatment Systems, a division of Chandler Systems Inc. As one of the co-founders of Water Soft Inc., Bill brought his experience and innovation to CSI that built one of the most successful water treatment companies in the industry.
  • In 1995 CSI introduced their first propriety product, the ReactR™, an advanced innovation in the treatment of water using a natural aeration process.


  • In 2003 the Signature Series™, Chandler Systems first proprietary control valve, was introduced to the market. CSI pioneered the first use of DC motors to position their valve for the electronic era.


  • In January of 2008 Bill sold the controls division of Chandler Systems Inc. to SJE Rhombus, a leader in the wastewater controls industry.
  • Almost 20 years later, in June of 2008, Bill Chandler acquired the WaterSoft division back from Amtrol and moved production back to Ashland.


  • In 2012 innovation continues as the Signature Series 2™ and Isobar II™ control valves are introduced.


  • In 2013 the Nitro™ and Centuri™ single tank aeration filters are released with patented air injection technology.


  • In 2015 the Sidekick™ Single Tank Aeration Filter with Ozone Complete featuring the industry’s first single tank aeration filter with the control valve separated from the filter tank is added to our line. Along with other benefits this patented technology eliminates the accumulation of iron in the control valve.


  • In 2016 the NEW Legacy View Bluetooth Control Valves will begin production at Chandler Systems. Using Android and Apple apps with Bluetooth communication drastically simplifies system setup and control.


  • November of 2017 the Signature Series 3™ and Isobar III™ control valves are introduced with a new high flow body and improved plumbing connections.
  • July 25th of 2017 the first of over 20 DROP related patents issues.


  • March of 2018 the original release of DROP Products that included the DROP Hub, DROP Leak Detector, DROP Residential Valves for DROP Softeners and Filters and the DROP Salt Sensor.


  • January of 2019 the DROP Home Protection System and DROP Remote are introduced.
  • December of 2019 the DROP Ozone Generator to use with the DROP Single Tank Aeration Filter.


  • January of 2020 we introduced our first product to be used with a well pump, the DROP Pump Controller.
  • May of 2020 DROP makes the move into commercial products with the DROP Commercial Protection Systems and the DROP Aux Box.
  • July of 2020 our commitment to DROP Commercial Products continues with the release of the DROP 1.25″ and 1.5″ Commercial Valves.


  • CSI Fresh Tap introduced.
  • September of 2022, in order to improve our HUB, we updated to DROP HUB 2 adding Bluetooth for easier sign on.


  • TC City Softeners begin production.
  • March of 2023 the pure and simple DROP Reverse Osmosis System is released.
  • December of 2023 the DROP Alert gives you the opportunity to monitor your sump pump…all the time.


  • May of 2024 introduction of CSI S4 Control Valve.


  • From 2018 to today there has been a steady release of products into the DROP ecosystem now consisting of the DROP Hub, residential water softeners, backwashing filters, cartridge filters, aeration filters, leak detectors, home protection valves, well pump controllers, the remote, reverse osmosis system, sump pump monitor, as well as commercial softeners, backwashing filters, and protection valves.
  • With a full team of dedicated R&D software, electronic, and mechanical engineers there is always more to come.


Chandler Systems, Inc. operates in an extensively renovated, 70,000 square-foot facility located at 710 Orange Street, in Ashland, Ohio.

Give us a call at 1.888.363.9434

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  • 888-363-9434 ext 139 (Jacob Studer)
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Chandler Systems Brand Video


At Chandler Systems, we are committed to ongoing R&D that leads to true innovation and breakthrough technologies in the water treatment industry. That’s why we research, design and engineer our own innovative products in-house, and thoroughly test and prove every new design in our onsite, state-of-the-art test laboratory.

We have decades of history of pushing the limits of what is possible in water treatment, and we believe that our commitment to R&D will be what continues to distinguish Chandler Systems in the industry for decades to come. We believe that it is both our privilege and obligation to develop the technology and products necessary to solve the world’s most challenging water quality issues.

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