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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.

Green Chemistry

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Formulated with purified tannins derived from sustainable sources, our technology offers a naturally responsible approach to water treatment while remaining readily biodegradable and environmentally compatible.

Surface Protection

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A protective molecular layer shields system surfaces from corrosion and deposits, ensuring reliable protection across multiple metals including aluminum, mild steel, and copper.

Heat Efficiency

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Keeping heat transfer surfaces clean and free of insulating deposits helps maintain optimal thermal conductivity and ensures boilers operate at their highest heat transfer efficiency.

Cleaning the Loop

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Gradually removing accumulated scale and corrosion by-products from system surfaces, helping restore cleaner circulation paths throughout the loop.

Easier Testing

Simple colorimetric or color comparison tests allow quick and reliable monitoring, making routine water quality verification fast and easy.

Non Hazardous

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Non-toxic and designed for safer handling, the formulation helps improve safety for operators during routine use while supporting responsible disposal, allowing treated water to be discharged.

Water Quality Standards

Known

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

Learn more

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

TG 3304 PM2

Liquid form Purified Tannin
2 gallons per 1,000 gallons (2,000 ppm)
Non Hazardous

How to Measure Purified Tannin

A simple colorimetric test is needed to measure the tannins' residual in a loop.

In case of product overfeed, closed loop system will be protected against corrosion as long as the targeted pH range is being followed.

Monitoring the System

Operators should regularly test pH, conductivity, and tannin residual to ensure proper water treatment. Regular monitoring helps maintain stable system protection.

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Testing

Operators should test pH, conductivity, and residual tannin to verify that the treatment program remains within the target range. Testing is recommended once per week using The Tannin Guys closed-loop test kits.

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Log Book

All test results should be recorded in a log book by the operator performing the tests. This record helps track system performance and maintain program control.

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Recirculation

When systems are shut down, water should be recirculated at least 1 hour per day to maintain continuous surface protection inside the system.

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.

Get the guide

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.