Balanced Sulfite Boiler Treatment for Hot Water Boilers and Closed Systems

CI WT No. 20 is the broad-coverage boiler compound for hot water and chilled water systems built with mixed metals — steel, copper, and brass running in the same loop. Its multi-component chemistry handles several failure modes simultaneously: nitrite forms a protective oxide film against general corrosion, sodium sulfite scavenges dissolved oxygen before it can pit tube walls, phosphates and organophosphonates control scale deposition from hardness minerals, and alkaline agents keep system pH in the protective range for ferrous and non-ferrous metals together. Where CI Alum Boiler Treatment exists for the narrow case of aluminum systems that need a controlled pH 8 environment, No. 20 is the workhorse for conventional steel-copper-brass systems that need corrosion protection, scale control, and oxygen management in a single treatment rather than layering three separate products. Well-suited for food processing facilities, institutional heating plants, and industrial process loops where system integrity directly affects production uptime. Compatible with standard boiler water testing routines — operators can monitor pH, phosphate, phosphonate, and sulfite levels against established control ranges and adjust dosing with confidence. Covers more metals, addresses more failure modes, and consolidates the treatment program into one compound for systems where the metallurgy is conventional and the consequences of neglect are not.