H-O-H Water Technology, Inc. - Palatine, IL
Manufacturer, Service Company
Manufacturer & distributor of water treatment systems. Various products include actuators, agitators, analyzers, brominator assemblies, storage tanks, control panels, feeders, vessels, cartridges, filters, housings, indicators, switches, pumps, strainers, meters, valves, sample coolers, membranes, test kits, colorimeters, reagents, chemicals, coagulants, flocculants, enzymes, metal precipitants, micro-biocides, cleaners, burets, comparator boxes, electrodes, filter papers, funnels, flasks, graduated cylinders, test strips, pipettes, spoons, cabinets & vials. Water treatment equipment including green machines, reverse osmosis & chlorine dioxide feed systems & water softeners are also available. Applications include hot, chilled, steam boiler, domestic & waste water systems & water conservation strategies.
www.hohwatertechnology.com/steam-boiler-wat...

Nalco Co. - Naperville, IL
Manufacturer, Custom Manufacturer, Service Company
Water Treatment Chemicals/Services For Boilers, Cooling Towers, Heat Exchangers & Chillers, Influent/Effluent Treatment Systems, Process Heating & Cooling. Specialized Services Include Water Hygiene Services. IAQ Programs & Comprehensive Systems For Chemical Application, Control/Diagnostics

G & O Thermal Supply Co. - Chicago, IL
Distributor, Custom Manufacturer
Distributor of boiler treatment chemicals for hot water & steam boilers.
Brand Names: Nu-Calgon, Stewart Hall

Heisler Green - Downers Grove, IL
Manufacturer, Custom Manufacturer, Service Company
Water treatment service including surveys, onsite testing, analysis, consultations, support, feed system repair, installations for all applications. Water, deposit, metallurgical, corrosion & microbiological studies conducted onsite & in lab.