The Tannin Guys® WATER TREATMENT NETWORK
International network of experts in purified tannin water treatment for steam boilers and closed-loops heating and cooling systems.
TOGETHER, WE TRANSFORM THE WORLD
Every day, in plants and institutions across the globe, members of The Tannin Guys® do more than treat water — they change the game. With purified tannins, they help their customers save millions of gallons of water, slash energy consumption, and cut greenhouse gas emissions. Results that matter… not just for business performance, but, above all, for the planet we share.
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Choosing a Tannin Guys® member is more than buying a water treatment service. It’s joining a worldwide movement where every treated boiler and every optimized closed-loop system is a tangible step toward a cleaner, more sustainable future.
The Tannin Guys® is the only global network of water treatment experts united by a clear mission: to combine world-class technical expertise with measurable environmental impact. Across continents, our members embody excellence, reliability, and integrity. They are leaders in their regions, chosen by the most demanding clients, and committed to delivering solutions that truly transform the world.
SOLUTIONS
Steam Boilers
Water Treatment
Purified Tannins for Steam Boilers
Plant-based and multi-functional, purified tannins act as scale and corrosion inhibitors, oxygen scavengers, dispersants, and condensate treatment for steam boiler water systems.
They protect equipment, optimize heat exchange, and deliver measurable results:
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Up to 5% less GHG emissions and energy use
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Up to 20% less water consumption
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Up to 80% less wastewater discharge
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Extended equipment life through reduced scaling and corrosion
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Lower maintenance costs with cleaner, more efficient systems
A sustainable solution for performance, efficiency, and the planet.
Heating & Cooling Closed-Loops
Water Treatment
Purified Tannins for Closed-Loops
Plant-based and non-hazardous, purified tannins act as scale and corrosion inhibitors and oxygen scavengers for closed heating and cooling water systems.
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They protect equipment, optimize heat exchange, and provide:
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Safer handling — non-toxic, molybdate-free formulation
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Multi-metal protection for steel, aluminum, and copper
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Extended equipment life through reduced corrosion and scaling
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Lower maintenance costs thanks to cleaner, more stable systems
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Support for sustainability goals by reducing chemical impact and resource use
A high-performance, eco-friendly solution for closed-loop system longevity, safety, and cost savings.
Clozit Online Energy Analysis Tool
Purified Tannins Explained Through Clozit
CLOZIT closes the gap between your current operating method and proven opportunities to save water, energy, and costs in steam boiler operations.
Through detailed mass balance analysis, CLOZIT helps you:
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Improve operations and reduce steam costs
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Get accurate, data-driven insights to assess your water treatment program
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Adopt a sustainable approach with no capital investment required
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Identify hidden inefficiencies and capture quick wins
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Support environmental targets by reducing resource consumption and emissions​
A precise, cost-effective way to unlock performance, savings, and sustainability.
Our Story
The Tannin Guys® was founded by TGWT, a pioneer in the development and application of purified tannins for industrial water treatment. In 2014, TGWT joined forces with Korn GmbH, a recognized leader in European water treatment solutions.
Korn embraced this initiative, championing the growth of the network across Europe and adding decades of technical expertise, innovation, and regional insight.
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Shared Belief
From that partnership grew a worldwide alliance — experts and distributors connected not just by technology, but by a shared belief: that industrial water treatment can be both highly efficient and environmentally responsible.
Together, We Transform The World
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One boiler. One system. One customer at a time.