Sustainable Water Treatment For Aluminum Boilers
Program Benefits
Green Chemistry
Purified tannins
Sustainable
Biodegradable
Surface Protection
Multi-Metal Protection for:
Aluminum
Mild steel
Copper
Heat Efficiency
Maintaining or restoring your high heat efficiency
Cleaning the Loop
Slowly cleaning scale and corrosion by-products
Easier Testing
Simple, time-saving colorimetric or color comparison tests available
Non Hazardous
Safer to handle
Non toxic
Can be sent to drain
German Engineering
Purified Tannin has been protecting heating loops since 1989 in Europe and 2005 in North America.
Beware of imitations. Tannins are complex molecules and only one program has been tested and endorsed by Patterson-Kelley.


About Us
Patterson-Kelley
Harsco Industrial Patterson-Kelley is a recognized market leader and major producer of heat transfer equipment.
Their hot water boilers and water heaters are installed in institutional, commercial, and industrial building applications such as: schools, offices, apartment buildings, dormitories, hospitals, and hotels.
TGWT
Clean Technologies
TGWT, also known as The Tannin Guys®, is a leader in green chemistry, water treatment for steam boilers and closed, hot loops.
Green chemistry to improve performance without capital investment.