Cooling Tower Water Treatment

Cooling Tower Water Treatment

The self-priming Stenner metering pump is beneficial in the delivery of off gassing chemicals like stabilized bromine and sodium hypochlorite.


High quality water extends the life and contributes to the efficiency of the cooling system. Cooling towers require water treatment to reduce the costly adverse effects of scale, corrosion, fouling and microbiological contamination. To battle scaling and biological fouling, Stenner peristaltic metering pumps are used to meter corrosion inhibitors such as polyphosphates and biocides such as chlorine and bromine. Liquid biocides can be injected to disinfect the cooling tower water to prevent the formation of Legionella, the bacterium that causes Legionnaires' disease. Some applications also require the addition of sulfuric or hydrochloric acid for pH control to maintain the water chemistry balance required for efficient operation of the cooling tower system.


Water reclamation and water reuse provide savings and conservation and may be necessary to comply with environmental regulations. Wastewater is cleaned with biological and chemical treatment for non-potable water. Stenner peristaltic pumps can reliably inject solutions to treat wastewater for reclaimed or recycled use.


Installation sites

Installation sites include cooling towers in hospitals, schools, hotels, condominiums, commercial buildings and industrial plants.


Select from a variety of Stenner products to fit the specific application:

  • The S Series is an advanced peristaltic metering pump specifically designed to interface with process control systems. Select from several modes of operation such as 4-20mA (scalable, invertible), Pulse, PPM Feed or Timer functions. Program up to three output relays in response to pump conditions such as tube leak, motor drive fault, process alarms or transfer to a backup pump.

  • Stenner's Classic Series single head adjustable pump can inject directly into the water line or can be activated by a pressure switch or controller.  For convenient and quick installations, the Tank System is shipped pre-assembled with the pump and tank.
  • The SVP series is a variable speed pump with a manual or automatic control to pace the pump. The SVP4 has a 4-20mA input signal follower to provide automatic adjustment of injection rates for maintaining pH and corrosion and scale control.

  • Another alternative for pH maintenance, corrosion, scale and algae control is the Proportional Injection System, Single or Dual, to provide proportional dosing based on the water system flow. A dry contact water meter is used to activate the pump for proportional chemical feed or if a pump control circuit is unavailable or impractical.

  • A proportional feed setup can be tailored to your specific application by purchasing separately, the PCM, plastic or stainless steel water meter and the Classic series single head fixed output pump.

  • The Econ T pump provides a flexible dosing schedule with 24 separate On and Off events to inject solutions based on time.