HomeFAQsLiquid Vacuum Trucks


Liquid vacuum trucks are an essential part of a variety of commercial and industrial environments. Despite being widely used, questions about how these trucks work and differences in size often come up.

This guide answers these frequently asked questions and more.

How do liquid vacuum trucks work?

These trucks usually have a big vacuum tank (about 8 to10m³) with a vacuum pump ranging from 500-2,000 m³/hr. Older models have noisier and less efficient vane pumps, but newer equipment use more efficient liquid ring pumps or high-performance blowers for better results. The Cappellotto (CAP VAC 2600 6x4), utilises an even higher productivity vacuum blower that produces 1,901m3/.hr which has higher productivity than the majority of other liquid waste trucks in the market today.

What are the different types of liquid vacuum trucks?

Each liquid vacuum truck is designed for specific tasks. Simple waste trucks have large tanks and smaller pumps whereas industrial service trucks typically have bigger pumps for more power (up to 10 times the performance), but have similar tank sizes. Hydro Excavation trucks mix medium-sized tanks and pumps with added high-pressure water systems and an overhead boom, and trucks for cleaning sewers have large flow high-pressure water pumps and hose reels. For dry waste vacuuming, trucks with baghouse filters for fine materials are recommended.

What are the safety features in liquid vacuum trucks?

These trucks should come with emergency stops, temperature sensors, vacuum filters, hydraulic safety valves, and vacuum breaker valves to ensure safe operations. Vacuum relief valves are also needed if the vacuum pump is not capable of working at 93-95% vacuum capacity.

How does the suction power of a liquid vacuum truck affect its performance?

The performance of these trucks depends on their vacuum level and pump size. Cappellotto liquid vacuum trucks, for example, lead the market with a 95% vacuum and 1,901m³/hr airspeed. A smaller pump for either airspeed or vacuum level will dramatically reduce the productivity or speed at which liquid can be recovered by vacuum to the tank.

Where are liquid vacuum trucks used?

These trucks are vital in various industrial and commercial settings, including but not limited to:

  • Household septics
    Portable toilets
  • Grease traps
  • Industrial liquid waste
  • Emergency spills
  • Industrial cleaning
  • Water Authority asset cleaning
  • Other applications where bulk liquid cannot easily be moved
What are the maintenance requirements for liquid vacuum trucks?

Keeping these trucks in top shape is crucial. Regular maintenance, including daily, weekly, and monthly check-ups, and regular servicing of both the vacuum and chassis help to maintain their performance and longevity.

What are the regulations and operating permits for liquid vacuum trucks?

Depending on where and how you use these trucks, you might need specific permits. Always check with local authorities to ensure you're compliant with regulations before commencing any work.

What are the average liquid vacuum truck capacities?

Most waste trucks can hold around 10m³, but sizes can vary from 1m³ to 25m³, offering options for different business needs.

Find the Right Liquid Vacuum Truck for Your Needs

To find the right liquid vacuum truck for your needs, viewneeds view our range of market-leading Capelotto trucks or speak to one of our experts today.