Nu-Calgon 4778-21 Commercial Spray Gun

The Nu-Calgon 4778-21 Commercial Spray Gun is a cleaning and maintenance tool used to apply coil cleaners, detergents, and rinsing solutions to compatible equipment surfaces in HVAC systems. Commonly used with evaporator coils, condenser coils, and refrigeration components, this spray gun helps distribute cleaning agents evenly during preventive maintenance and servicing procedures. Its design supports controlled liquid flow for cleaning applications requiring directed spray coverage and consistent application pressure. it is a part of maintenance, assisting technicians with cleaning buildup and debris from internal system and heat transfer surfaces.