This Nu-Calgon 4207-47 is a concentrated ice machine cleaner designed for heavy-duty limescale removal in commercial systems. Formulated with 75% food-grade phosphoric acid, it remains the most concentrated option on the market, featuring a specific gravity of 1.63. It delivers fast-acting descaling without releasing harsh fumes, making it safe for use in food-service environments. This solution is specifically engineered to dissolve mineral deposits that cause plugged distribution holes and restricted water flow in ice machine maintenance. It is compatible with cubers, flakers, drums, and tube machines, though it should not be used on nickel-plated or galvanized surfaces—technicians should specify Nickel-Safe ice machine cleaner for those applications. The standard usage rate is 8 fluid ounces per three gallons of water. This phosphoric acid cleaner also effectively removes scale from coffee urns and cooling towers without rapidly attacking copper or brass components. Key Benefits High Concentration: 75% phosphoric acid formula ensures maximum strength for cleaning ice machine evaporators. OEM Compatibility: Suitable for all makes and models of ice makers including flakers and cubers with non-nickel surfaces. Fast-Acting Descaling: Rapidly dissolves calcium and lime deposits to prevent auger jamming and harvest reduction. Food-Service Safe: Meets USDA guidelines and is NSF registered for use in and around food processing areas. Versatile Application: Effective for descaling coffee brewers, vending equipment, and humidifiers. Common Questions Is this cleaner safe for nickel-plated evaporators? No, this specific formula is 75% phosphoric acid and can damage nickel plating. For Manitowoc or other nickel-plated systems, use Nu-Calgon Nickel-Safe Ice Machine Cleaner (4287-34). What is the proper dilution ratio? The standard mix is 8 fluid ounces of cleaner per 3 gallons of system water. For heavy scale buildup, a second application or manual brushing with the solution may be required. Can this be used on stainless steel components? Yes, this food-grade formula does not contain chlorine or chlorides, making it safe for stainless steel surfaces when used according to the directions. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
