Vacuum Tanker Service
A Hydrovac vacuum truck or vacuum tanker is a tank truck or Hydrovac that has a pump and a tank. The pump is designed to pneumatically create a vacuum that sucks liquids, sludges, slurries, or the like from a location (often underground) into the tank of the truck. It is common practice to use these trucks in the oilfield as there is often solids mixed in with the liquids. The objective is to enable transport of the liquid material via road to another location & unload. Vacuum trucks & Hydrovacs transport the collected material to a treatment or disposal site, for example a sewage treatment plant.
A common material to be transport is septage (or more broadly: fecal sludge) which is human excreta mixed with water, e.g. from septic tanks and pit latrines). They also transport sewage sludge, industrial liquids like oil or produced water, refined products, or slurries from animal waste from livestock facilities with pens. Even potable water if needed.
Vacuum trucks can be equipped with a high pressure pump if they are used to clean out sewers from sand.
It is common for fluids to be thick or dense. It is very advantageous for a Hydrovac to have heated high-pressure water capability to dilute the materials into a slurry or less dense. This makes it easier for the high-powered vacuum created by a Hydrovac to vacuum on the slurry.