
Water Treatment Program for Aluminum Boilers
Developed through a close collaboration between The Tannin Guys® and Patterson-Kelley®, this treatment program is specifically engineered for aluminum boiler systems and is recommended by Patterson-Kelley® for use with their equipment. It supports safe operation at pH levels up to 9.0 while preserving the integrity and long-term performance of aluminum heat exchangers.
Water Quality Standards

Known
Standards to preserve the operating efficiency of all Patterson-Kelley condensing boilers

New Standards for pH 8.0-9.0
Our program allows you to extend the pH range in your closed loop for a complete protection: Aluminum (boiler), Mild Steel (piping) & multi-metals
Reference:
R. Gaudreault, M. Dargahi; TGWT Inc.
Purified Tannin Products
Monitoring the System
Operators should regularly test pH, conductivity, and tannin residual to ensure proper water treatment. Regular monitoring helps maintain stable system protection.
Best Practices Guide
Having the right mechanical equipment is the first step on making it right. You will save on water treatment and protect your multi-metal, closed loop hydronic systems.


Patterson-Kelley
Patterson-Kelley® is a leading U.S. manufacturer of high-efficiency commercial boilers and heat transfer equipment. With over 140 years of engineering expertise, their systems are widely used in institutional, commercial, and industrial facilities worldwide and are recognized for their reliability, innovation, and performance.
The Tannin Guys
The Tannin Guys® is a global network of water treatment experts specializing in sustainable boiler and closed-loop solutions using purified tannins. By combining technical expertise with environmentally responsible chemistry, their members help facilities reduce water use, energy consumption, and environmental impact while maintaining reliable system performance.







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