This pressure washer buying guide covers the three things that decide performance: PSI (pressure), flow rate in litres per minute, and the attachments you get. For most Australian homes, an electric model around 1800 to 2200 PSI cleans paths, cars and decks well, while petrol suits big driveways and paint prep.
What does PSI actually mean?
PSI, or pounds per square inch, is the force the water hits the surface with. Higher PSI blasts through tougher grime, but it can also strip paint, gouge soft timber and damage render if you get too close.
As a rough guide, light home jobs like cars and outdoor furniture are happy around 1500 to 1900 PSI. Paths, brick and decks like 1900 to 2500 PSI, while heavy driveway and paint-prep work benefits from 2500 PSI and up.
More pressure is not automatically better. Matching PSI to the surface protects your home and still gets it clean, so buy for your typical job rather than the biggest number on the box.
Why flow rate matters as much as pressure
Flow rate is how much water moves through the machine, measured in litres per minute (L/min). Pressure knocks the dirt loose, but flow rate is what rinses it away, so the two work as a team.
A washer with strong PSI but weak flow can feel slow, because you spend ages pushing residue around. A balanced machine with a healthy L/min clears a surface in fewer passes and saves both time and water.
When you compare models, look at PSI and flow rate together. A well-matched pair beats a headline pressure figure every time, especially on large areas.
Electric or petrol: which suits you?
Electric pressure washers are the right pick for most homes. They are lighter, quieter, cheaper to run and need almost no maintenance, which makes them ideal for cars, courtyards, paths and gutters near a power point.
Petrol pressure washers deliver more grunt and go anywhere without a cord, so they suit long driveways, rural blocks, sheds and serious paint or deck prep. The trade-off is noise, weight, fuel and servicing.
| Consideration | Electric | Petrol |
|---|---|---|
| Best for | Cars, paths, furniture, courtyards | Driveways, rural blocks, paint prep |
| Typical pressure | Lower to mid range | Higher |
| Noise | Quiet | Loud |
| Maintenance | Minimal | Oil, fuel, servicing |
| Portability | Limited by cord | Goes anywhere |
| Running cost | Low | Higher |
Which pressure washer suits which person?
Match the machine to how you will really use it, not to the toughest job you might tackle once a year. That keeps the cost, weight and noise sensible for everyday cleaning.
- The apartment or townhouse owner: a compact electric unit around 1500 to 1800 PSI for the car, balcony and bins.
- The suburban homeowner: a mid-range electric model near 2000 PSI that handles paths, fences, decks and the driveway.
- The renovator or tradie: a high-PSI electric or an entry petrol washer for paint stripping and prepping large surfaces.
- The acreage or rural owner: a petrol machine for sheds, machinery, long driveways and areas far from power.
You will find outdoor cleaning and maintenance gear across our garden and outdoor range to pair with whichever washer you choose.
Which attachments actually matter?
The nozzles and add-ons often decide how useful a washer feels day to day. A good set turns one machine into a tool for many surfaces, so check what is included before you buy.
Nozzles and lances
Most washers ship with several spray tips or an adjustable nozzle. A wider fan angle is gentle and safe for cars and render, while a narrow or turbo nozzle concentrates the jet for stubborn moss and stains.
Surface cleaners and brushes
A flat surface cleaner is a spinning disc that gives streak-free, even results on driveways, patios and pool surrounds far faster than a lance alone. Soft brush heads are ideal for cars and painted surfaces.
Detergent tanks and hoses
A built-in detergent tank or foam lance lets you pre-soak grime so it lifts with less pressure. A longer high-pressure hose means fewer times you stop to move the machine around the yard.
Care and usage tips
A pressure washer lasts longer when you treat it well. A few simple habits keep the pump healthy and your surfaces undamaged season after season.
- Always start with the widest, gentlest nozzle and step up only if needed.
- Keep the tip about 30cm from delicate surfaces, then move closer with care.
- Never run the pump dry, and check the water inlet filter for grit.
- Flush detergent through after use so residue does not clog the system.
- Store it drained and frost-free, and coil the hose without kinks.
These small steps protect both the machine and your paths, timber and paintwork.
Rounding out your outdoor kit
A pressure washer pairs naturally with the rest of your outdoor and gardening gear, so it is worth thinking about the whole job, not just the cleaning. Once a deck or garden bed is freshly cleaned, it is a great time to refresh the space around it.
Keen growers often follow a clean-up with planting. A tidy patch is the perfect moment to sow Mr Fothergill's Spinach Matador seeds for fast baby leaves, or start a white button mushroom growing kit in a shaded, cleaned-down corner of the shed. Explore the wider tools and auto range too, since a washer earns its keep on the car, trailer and mower as much as around the house.
Buy for your most common job, check that PSI and flow rate are balanced, and make sure the attachments match the surfaces you clean most. Get those three right and your pressure washer will pay for itself every wash.
Frequently asked questions
What PSI pressure washer do I need for home use?
For most Australian homes, 1800 to 2200 PSI is the sweet spot. It cleans cars, paths, fences and decks without stripping paint or gouging timber. Go lower for delicate surfaces and cars only, and step up past 2500 PSI mainly for big driveways, concrete and paint-prep work.
Is flow rate or PSI more important?
Both matter and work together. PSI knocks dirt loose, while flow rate in litres per minute rinses it away. A high-PSI machine with weak flow feels slow on large areas, so look for a balanced pair rather than chasing the biggest pressure number alone.
Should I buy an electric or petrol pressure washer?
Electric suits most homes: it is lighter, quieter, cheaper to run and needs little maintenance, ideal near a power point. Choose petrol if you have a long driveway, rural block or need to work far from power, or you regularly strip paint and clean large, tough surfaces.
What pressure washer attachments are worth having?
A flat surface cleaner transforms driveways and patios, giving fast, even results. Several nozzle angles let you switch between gentle car washing and blasting moss, while a detergent tank or foam lance helps lift grease with less pressure. A longer hose saves you moving the machine so often.
