Blog

Hydro-excavation is no longer a niche service—it’s become the preferred method for digging near utilities, pipelines, and sensitive infrastructure. And with the U.S. vacuum truck market projected to hit $3.32 billion by 2033, there’s no question about demand. But here’s the thing: not every truck can handle the grind.

When it comes to hydro-excavating, the right vacuum truck can save time, reduce risk, and cut operating costs. However, it needs to have the muscle and configuration to do the job right. Let’s break down what actually makes a used vacuum truck perfect for hydro-excavating tasks.

1. High-Performance Blowers and Suction Power

Hydro-excavation isn’t just about water—it’s about suction. After high-pressure water breaks up the soil, the vacuum system has to lift that slurry quickly and efficiently.

Look for used vacuum trucks with positive displacement blowers delivering at least 3,000 CFM and 15-27” Hg. Anything less slows down your work, especially in clay or frost-heavy ground.

2. Water Pressure You Can Count On

For hydro-excavating jobs, your truck needs a water pump capable of at least 10–20 GPM at 2,500–3,000 PSI. That’s the sweet spot for cutting through compact soil without damaging underground utilities.

Used vacuum trucks equipped with Hydra-Flex or Giant pumps deliver this range consistently. Make sure the truck includes a water heater or boiler system for frozen ground—it’s a must-have in colder climates.

3. Debris Tank Capacity That Matches Your Site

Tank size can either keep you working or keep you stuck dumping every hour. For most hydro-excavating tasks, you’ll want a debris tank size of at least 10-15 cubic yards.

This is especially true for utility work, day lighting, and trenching on big industrial or municipal jobs. Stainless steel or coated tanks are preferred to prevent rust or internal wear from slurry.

Note: Some used vacuum trucks for sale may offer split tank configurations—make sure the debris-to-water ratio fits your project demands.

4. Strong Water Tank and Heated Lines

Hydro work doesn’t stop when temperatures drop. Heated water lines and tanks prevent freezing, and tanks should hold 600–1,200 gallons minimum to support all-day excavation.

Aluminum or poly tanks reduce weight and resist corrosion. Check if the truck has onboard re circulation systems—they keep your water warm and pressurized during idle times.

5. Boom Reach and Hose Flexibility

Jobsites don’t always allow you to park right on top of the dig zone. That’s why boom reach matters. Look for used vacuum trucks with hydraulic booms extending 20–25 feet and capable of rotating 270° or more.

Flexibility in hose diameter (typically 6–8 inches) also determines how quickly you can move spoil material. A longer boom and proper hose setup reduce the need for repositioning, which boosts efficiency.

6. Filtration Systems for Longer Operation

Clogged filters mean lost hours. Trucks with cyclone separators and multi-stage filtration keep debris from choking the blower system. When buying used vacuum trucks, check that filters and separators have been maintained properly and replaced on schedule.

Also, verify that the bag house or final filter stage is intact. A compromised filter system leads to costly repairs and downtime.

Invest in Top-Quality Vacuum Trucks for Hydro-Excavating

Looking for used vacuum trucks for sale in NV, that can take on serious hydro-excavation jobs? At Big Truck & Equipment Sales, we stock high-performance vacuum trucks for hydro-excavating tasks built to handle tough digging conditions—at prices that make sense. Each truck is thoroughly inspected and ready to work. Contact us today or browse our inventory online to find the perfect fit for your crew.