Vacuum Trucks For Sale

Start with airflow and vacuum level. Performance is typically defined by CFM and inches of mercury. Heavy sludges and dense solids call for higher vacuum, often 25 to 28 inches Hg with strong water lift, plus robust filtration to protect the pump. Dry bulk recovery favors higher airflow and multi-stage cyclones or baghouse filtration. Positive displacement blowers dominate industrial duty for their broad CFM range and deep vacuum, liquid ring pumps excel with continuous wet loads and vapor handling, and rotary vane pumps remain popular on septic service for simplicity and steady suction.

Configurations vary by job. Septic and grease trucks usually carry 2,000 to 5,000 gallons with rotary vane or liquid ring pumps, 3 or 4 inch suction lines, and rear pressure offload for quick turnarounds. Hydrovac units pair a debris body of roughly 6 to 15 cubic yards with a water tank of 300 to 1,200 gallons, using 10 to 25 gpm at 2,500 to 4,000 psi for non-destructive digging. Combination sewer jetter vacuum trucks add a jetting system typically 50 to 80 gpm at 2,000 to 3,000 psi with 600 to 1,000 feet of hose, plus a debris tank and boom-mounted suction for catch basins and mains. Industrial vacuum loaders push higher CFM and larger diameter hose for plant cleanouts, catalyst, cement, or frac sand, often with multi-stage cyclones, final filters, and silencing.

Tank design affects payload, longevity, and compliance. Carbon steel is common for general duty, stainless or lined carbon steel resists corrosives, and DOT 407 or 412 coded tanks are needed for certain regulated materials. Rear full-opening doors with dual locks and hydraulic hoists enable true dump-out and rinsing, while pressure offload is faster for liquids but demands tight seals and disciplined safety. Look for efficient moisture traps, cyclones, and final filtration to protect the blower, along with washdown systems, heated cabinets, boiler packages for freezing climates, and remote pendant or wireless boom controls. Boom reach, 6 to 8 inch suction, and hose storage impact productivity in tight alleys or deep excavations.

Chassis and driveline choices determine legal payload and access. Tandem 6x4 works for municipal and septic routes, tri-axle or lift axle setups help meet bridge laws on heavy slurry. Shorter wheelbases turn better for urban catch basins, longer frames carry larger tanks but increase off-tracking. PTO drive can be transmission or split-shaft, and high CFM blowers benefit from higher engine horsepower and robust cooling. Allison automatics simplify stop-start work, while manual transmissions can reduce PTO parasitic loss. Consider emissions package, noise attenuation, grounding provisions, and spark-resistant tooling for refineries or grain facilities. Maintenance planning matters too, including blower lube and belt service intervals, cyclone cleanout, baghouse inspection, and relief valve testing, which all protect uptime and keep vacuum performance consistent.