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CL-2 Closed Loop Treatment

HVAC Water Treatment

CL-2 Closed Loop Treatment

CL-2 is designed as a corrosion inhibitor for closed loop chilled water systems or closed loop hot water systems. CL-2 is a blend of three separate corrosion inhibitors, a surfactant and an iron oxide reducing agent.


Field Control:

Control Nitrite levels between 800-1200 ppm. Phenolphthalein is used as a tracer. If pink color appears in the treated system, Nitrite residual is present.
Product dosage/100 gallons system volume to obtain 1000 ppm NaNO2 is 0.285 gallons or 3.19 pounds.



See Technical Data HERE


See CL-2 Label Copy


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corrosion inhibitor for closed loop chilled water or hot water


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