The Nu-Calgon 4778-26 Coil Gun Connector/Turbo Tank is a replacement accessory designed for compatible HVAC coil cleaning equipment. It connects the coil cleaning gun to the Turbo Tank, allowing cleaning solution to be delivered through the system for effective removal of dirt, grease, and buildup from air conditioning and refrigeration coils. Suitable for servicing evaporator and con... https://www.partshnc.com/nu-calgon-4778-26-coil-gun-connector-turbo-tank