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 TGWT PK Aluminum Boiler

Water Treatment To Protect Hot Water Aluminum Boilers

  • Allows operation up to a pH of 9.0

  • Recommended by the manufacturer

  • Program developed in collaboration between TGWT and Patterson-Kelley

Green Chemistry

Purified tannins

Surface Protection

Multi-Metal Protection for:
Mild steel

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

iPad showing PK and TGWT Water Treatment Program

About Us


Reliability. Efficiency. Innovation. Patterson-Kelley provides the industry with dependable, high-efficiency commercial heating solutions.


For more than 140 years, Patterson-Kelley has proudly served the commercial heating industry. Their commercial boilers and hot water heaters are designed and built in the USA and distributed throughout North America. 



TGWT stands for "The Green Water Treatment", a leader in green chemistry established in North America since 2005, affiliated with the German water treatment company Korn


Areas of expertise in water treatment: steam boilers, cooling towers, heating and cooling closed-loops and wastewater

Gold rating for Corporate Social Responsibility by the international firm Ecovadis


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