Hydro Excavator Trucks
Vacuum excavation trucks for non-destructive digging around services and utilities.
- High-CFM vacuum systems
- Pressurised water cutting
- Spoil tank capacities to 8m³
Equipment Guide · NZ
Hydro Excavator Trucks NZ
STG Global hydro excavation trucks built for safe, non-destructive digging across utilities, telco, civil and infrastructure work in NZ.
Quick answer
Hydro excavator trucks combine high-pressure water cutting with vacuum spoil collection to dig non-destructively around buried services. PS Equipment supplies STG Global hydro excavator trucks to New Zealand operators, with spoil tank capacities to 8m³ and high-CFM vacuum systems.
Who this equipment is for
- Utility, telco and civil contractors locating and exposing services
- Hydro excavation specialists building or replacing fleet
- Infrastructure crews working around live assets
- Operators servicing local authorities and asset owners
What to consider
Selection criteria
Spoil tank capacity
Tank size drives time between dumps. 6–8m³ suits most NZ utility and civil work.
Vacuum performance
Positive displacement blowers handle wet spoil and longer hose runs. CFM rating matters.
Water pressure and volume
3000 psi at usable flow handles most NZ ground. Heated water is useful for winter work.
Chassis
Isuzu and Hino 6x4 chassis are common. Confirm axle rules for fully loaded weight.
Operator safety
Hydro excavation reduces strike risk on buried services, but procedure and operator training are still critical.
Available equipment
Browse current categories
Specification comparison
At-a-glance options
| Class | Spoil tank | Water tank | Vacuum |
|---|---|---|---|
| Compact hydrovac | 4,000 L | 1,000 L | PD blower |
| Mid hydrovac | 6,000 L | 1,200 L | High-CFM PD blower |
| STG Hydrovac 8000 | 8,000 L | 1,500 L | High-CFM PD blower |
Configurations vary by chassis and operator preference.
Why PS Equipment
Trusted service for NZ operators.
PS Equipment is a specialist supplier of concrete pumping equipment, pump truck builds and selected truck-mounted machinery — backed by direct supplier relationships and in-house engineering.
- 25+ years specialising in concrete pumping equipment
- 300+ concrete pumps and machinery supplied across NZ and the Pacific
- Direct supplier relationships with Kyokuto, DY, Jacon and STG Global
- Genuine parts and in-house technical support
Parts pathway
Hydrovac service parts
Vacuum hose, water hose, nozzles, filters and service kits for STG hydro excavator trucks.
FAQs
Buyer questions, answered
Common questions from NZ operators. If yours isn't here, talk to Shaun.
What is a hydro excavator truck used for?+
Non-destructive digging — exposing buried services, potholing, trenching near utilities, and soft-touch excavation around assets that can't be hit with a digger.
What spoil tank size do I need?+
6–8m³ suits most NZ work. Smaller tanks suit urban work with quick dump access; larger tanks suit remote work.
Is hydro excavation safer than mechanical digging?+
It significantly reduces strike risk on buried services when run correctly, which is why it's increasingly required by asset owners.
Can hydro excavation work in winter?+
Yes — heated water tanks and operating procedures cover NZ winter conditions.
What chassis do STG hydrovacs use?+
Common choices are Isuzu and Hino 6x4. Configuration is confirmed at build.
Do you supply service parts?+
Yes — vacuum hose, water hose, nozzles and service items.
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PS Equipment works directly with manufacturers behind the world's most respected concrete pumping and specialist truck equipment, giving NZ operators access to genuine parts, technical knowledge and supplier-backed builds.
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Talk to a specialist
Tell us what equipment you're looking for.
We'll help you identify the right option, availability and next steps. Talk to Shaun for direct specialist advice.