--- title: "Vacuum Excavation vs Hydro Excavation" description: "Hydro excavation is a type of vacuum excavation, not a rival service. See how they relate, what QLD rules expect first, and what to send VACIT with an enquiry." canonical: "https://www.vac-it.com.au/post/vacuum-excavation-vs-hydro-excavation" last_modified: "2026-09-24" language: "en-AU" --- # Vacuum Excavation vs Hydro Excavation Published: 2026-09-24 Author: VACIT Hydro excavation is a type of vacuum excavation, not a rival method. Here is what the terms actually mean, what Queensland rules expect first, and what to send with an enquiry. ## Key takeaways - Hydro excavation is a type of vacuum excavation, not a competing service. Water loosens the ground, then the vacuum recovers it. - VACIT runs hydro excavation: a controlled water lance plus vacuum recovery, the method Before You Dig Australia lists as an accepted non-destructive potholing approach. - Queensland’s excavation code expects current underground services information first, then an initial exposure step, before wider digging proceeds. - Before You Dig Australia’s Five Ps put potholing third, after plan and prepare, and says only non-destructive methods should be used for it. - Access, ground conditions, water supply, depth and volume decide how a job is set up more than any method label does. ## On this page - [Is hydro excavation different from vacuum excavation?](#is-hydro-excavation-different-from-vacuum-excavation) - [What Queensland rules expect first](#what-queensland-rules-expect-first) - [What actually decides the approach on your site](#what-actually-decides-the-approach-on-your-site) - [What to send with an enquiry](#what-to-send-with-an-enquiry) ## Is hydro excavation different from vacuum excavation? Not really, and the two names sometimes turn up in a scope of works as if they were rival products. Vacuum excavation is the umbrella term for the process: material is loosened, then drawn up a suction hose into a tank on the truck instead of being lifted out mechanically. Hydro excavation, also called hydrovac, is the specific method VACIT runs to do that loosening. A controlled water lance breaks up the ground first, and the same vacuum hose recovers the resulting slurry. It is the industry’s standard non-destructive way of exposing underground assets without the disturbance of mechanical digging. Industry references also describe a dry, air-based version of vacuum excavation, where compressed air rather than water loosens the ground before recovery. That is a distinct method with its own conditions and is not a VACIT service; it is mentioned here only so the terminology is not confused with the water-based hydro excavation VACIT actually provides. ## What Queensland rules expect first Neither exposure method is the first step. Queensland’s [excavation work code of practice](https://www.worksafe.qld.gov.au/__data/assets/pdf_file/0018/72630/excavation-work-cop-2021.pdf) sets an information step ahead of any digging: before work starts, whoever manages or controls the workplace must take all reasonable steps to obtain current underground essential services information for the dig area and the ground next to it. That duty sits in section 304 of the Queensland [Work Health and Safety Regulation 2011](https://www.legislation.qld.gov.au/view/whole/html/inforce/2026-04-07/sl-2011-0240#sec.304). The information then has to be given to whoever carries the work out, considered while the work is done, and kept available for inspection. The code is direct about why an exposure step exists at all: available plans may not be accurate, so excavation methods should include an initial examination of the area, for example by sampling with water pressure and a vacuum system. [Before You Dig Australia](https://www.byda.com.au/before-you-dig/best-practice-guides/) sets out the same order in its Five Ps: plan, prepare, pothole, protect and proceed. Potholing sits third, and the guide is specific about method: only non-destructive methods should be used for it, including careful hand digging and hydro vacuum excavation. It also says to follow any asset owner’s specific requirements for working or potholing around their assets. **The order that matters:** Current plans first, then the asset owner’s permitted method, then the excavation. An exposure that finds an unmarked service or an unexpected depth is the method working, not failing. ## What actually decides the approach on your site Once the plans and the permitted method are settled, the choice comes down to site conditions rather than a method label. Access, hose distance, material, depth, volume and where the recovered slurry has to go are the practical inputs that shape any hydro excavation quote. ![VACIT operator using a vacuum hose inside a shored excavation to expose services below ground](https://www.vac-it.com.au/images/vacit/confined-site-vacuuming.webp) Access, shoring and hose reach often decide how a potholing job is set up before ground conditions get a vote. - Truck access and hose reach can decide what can physically get to the work area at all. - A practical water supply on site is needed for hydro excavation, along with somewhere for the recovered slurry to go. - Contamination, nearby hazards and the disposal path can change the setup regardless of ground type. - What comes after the exposure, whether it is trenching, boring or repair, shapes how the hole has to be left. If the underlying question is whether to dig by non-destructive means at all rather than mechanically, that comparison is covered in the related article on [non-destructive digging versus mechanical excavation near services](https://www.vac-it.com.au/post/non-destructive-digging-vs-mechanical-excavation-near-services). VACIT also provides [service locating](https://www.vac-it.com.au/services/underground-service-locators) and [utility mapping](https://www.vac-it.com.au/services/utility-mapping), so locating and hydro excavation can be planned together rather than run as separate site visits. ## What to send with an enquiry The most useful thing a site coordinator can do is describe the site rather than nominate a method. Those details are what let VACIT match the job to a hydro excavation approach and confirm whether locating support is also needed. - Site address, preferred timing and the work window. - Truck access and an estimated hose distance. - Known services, BYDA plans or marked assets. - Material, depth, volume and disposal needs. - Photos of the work area and the access route. - The trade or activity that follows the exposure. Current service areas, opening details and contact information are also kept up to date on the [VACIT Google Business Profile](https://share.google/6TWOcOvVZyhi1rnnd). ## Frequently asked questions ### Is hydro excavation the same as vacuum excavation? Hydro excavation is a type of vacuum excavation. Vacuum excavation is the process: loosened ground is drawn up a suction hose into the truck instead of being dug out with a bucket. Hydro excavation, also called hydrovac, is the version VACIT runs, where controlled water does the loosening before the vacuum recovers it. ### How deep can hydro excavation go? Depth is not a fixed property of the method, so there is no single figure to quote. The asset owner sets which method is permitted around their services, and how deep the work can actually go depends on site controls, ground conditions and the reach of the truck and hose. Tell VACIT the depth and what is being exposed, and the team can assess it against the site details. ### What counts as non-destructive digging near underground services? Before You Dig Australia lists careful hand digging and hydro vacuum excavation as accepted non-destructive potholing methods, once the asset owner has confirmed the permitted approach for their services. VACIT provides hydro excavation and vacuum recovery as part of that non-destructive work, alongside service locating and utility mapping. ## Contact VACIT - Phone: [0439 761 096](tel:0439761096) - Email: [info@vac-it.com.au](mailto:info@vac-it.com.au) - Online enquiry: [Request a quote](https://www.vac-it.com.au/request-a-quote) ## Sitemap - [Browse all VACIT pages](https://www.vac-it.com.au/sitemap.md)