GTC-540-55 Soot/Powder Recovery Boiler Cleaning Vacuum The GTC-540 Heavy-Duty Soot/Powder Recovery Vacuum including filters and 22"-24" diameter drum adapter ring (no drum). It is ideal for soot and powder recovery, and is the recommended vacuum for boiler cleaning. The GTC-540-55 can be used on 55 gallon (114 or 208 liter) drums. This Manual is restricted to verified Goodway customers only Follow the directions below to access this manual. Sign-in or register a new account with Goodway.com