Water Blaster Buying Guide
For home and light trade cleaning (driveways, decks, vehicles), a 3000 PSI petrol or electric cold-water blaster covers it.
For regular trade or commercial use, step up to a 4000 PSI Honda-powered unit for reliability and duty cycle.
For grease, oil or heavy contamination, you need hot water: a steam cleaner or hot-water blaster, not a standard cold-water unit.
For large-scale or mobile cleaning contracts, a trailer-mounted water blaster with its own tank is worth the extra cost.
Who this guide is for
Home and lifestyle block owners
Cleaning driveways, decks, fencing and vehicles occasionally.
Trade and commercial cleaners
Needing a reliable, higher-duty-cycle machine for regular use.
Workshops and industrial sites
Dealing with grease, oil and heavy contamination that cold water won't shift.
Decision table
| Factor | Cold water petrol/electric | Hot water (steam cleaner) | Trailer-mounted |
|---|---|---|---|
| Handles | General dirt, grime, mud, algae | Grease, oil, heavy contamination | Any of the above, at volume |
| Water source | Mains or tank, refilled as needed | Mains or tank | Onboard tank (up to 1000L) |
| Portability | Portable, carried or wheeled | Usually stationary/workshop-based | Towed, needs a vehicle |
| Best suited to | Driveways, decks, vehicles, general trade | Workshops, degreasing, food/industrial sites | Large properties, contractors, mobile cleaning rounds |
Riequip's current range by category
Titan and Honda Pro-Blast range
Titan-powered Pro-Blast models such as the DM3000TF ($860 + GST) and PB3000T-F ($1,280 + GST), plus the Honda-powered PB3000H-F ($1,980 + GST) for better reliability and easier servicing.
Honda-powered Pro-Blast range
Honda-powered Pro-Blast PB4000H-F (GX390 13hp, $2,990 + GST) and electric-start PB4000HE-F ($3,550 + GST), built for higher duty cycle than the 3000 PSI range.
Comet and Lavor steam cleaners
Electric steam cleaners from the Comet Scout 150C (90°C, 9L/min, $4,090 + GST) up to the Lavor Hyper 2021 Inox (140°C maximum, 435-2900 PSI, 10-21L/min, three-phase, $10,350 + GST) for heavier industrial use.
1000L trailer water blasters
Honda-powered 1000L trailer units from $9,450 + GST, or the Yanmar diesel-powered version at $16,400 + GST for continuous, fuel-efficient operation.
As one comparison: the Honda-powered Pro-Blast PB3000H-F ($1,980 + GST) costs more upfront than the Titan-powered DM3000TF ($860 + GST) at the same 3000 PSI rating, reflecting the more durable, easier-to-service Honda engine, similar to the petrol vs diesel generator trade-off covered elsewhere on this site. Riequip's full water blaster and steam cleaner range is browsable at riequip.co.nz/collections/water-blasters-steam-cleaners.
Why this recommendation fits
Pressure (PSI) alone doesn't tell the whole story: flow rate (litres per minute) determines how quickly a job gets done, and the two work together. A higher-PSI machine with low flow can still take a long time to clean a large area. Cold water handles most everyday dirt and grime, but grease and oil bond to surfaces in a way cold water struggles to shift, which is why hot water and steam cleaners exist as a separate category rather than just a more powerful cold-water unit.
When cold water won't cut it
Trying to remove workshop grease, oil stains or heavy food-industry contamination with a cold-water blaster is a common source of frustration, since the contamination re-hardens as soon as the water cools. If grease or oil is a regular part of the cleaning job, a hot water unit is worth the extra cost from the outset rather than upgrading later.
Limitations and alternatives
- PSI and flow figures are rated maximums; actual cleaning performance also depends on nozzle choice and surface type.
- Three-phase power is required for some of the higher-output hot water units; confirm your power supply before choosing a model.
- For occasional light use, a smaller unit may be more cost-effective than buying more capacity than the job needs.
Supporting evidence
- Water blaster and steam cleaner models, specifications and pricing referenced in this guide are drawn from Riequip's current range at riequip.co.nz/collections/water-blasters-steam-cleaners.
- Confirm exact requirements for your situation with a Riequip specialist before purchasing, as prices, specifications and stock availability are subject to change.
Frequently asked questions
- What PSI water blaster do I need for a driveway or deck?
- A 3000 PSI cold-water unit is generally sufficient for driveways, decks, fencing and vehicles. Stepping up to 4000 PSI mainly benefits regular or commercial use rather than occasional home jobs.
- Do I need a hot water or cold water water blaster?
- Cold water handles general dirt, mud and grime. Hot water or steam cleaning is needed for grease, oil or heavy contamination, which cold water alone struggles to remove effectively.
- Should I buy a petrol or electric water blaster?
- Petrol models are portable and don't need mains power, suiting outdoor and mobile use. Electric models, including most hot water steam cleaners, suit workshop or fixed-location use where power is already available.
- What is a trailer-mounted water blaster used for?
- Trailer-mounted units carry their own water tank (up to 1000L) and suit contractors or large properties needing to clean multiple areas without stopping to refill from a tap.
- What is the best high-pressure steam cleaner in NZ?
- For workshop degreasing and light industrial use, the Comet Scout 150C (90°C, 9L/min) suits lighter-duty steam cleaning; for heavier three-phase industrial use, the Lavor Hyper 2021 Inox (140°C maximum, 10-21L/min) offers higher pressure and flow for larger jobs.