Comparing pressure washers by specification does not work, because the specifications are not comparable: max PSI figures are measured differently, flow is often unstated, and every listing emphasizes whatever its machine happens to be good at. What does work is answering five questions in order. By question four the choice is usually down to two machines.
1. What is the biggest flat area you will clean, and how often?
This single question decides more than the rest combined, because flat concrete is the only job that genuinely demands capability.
No flat concrete — just a car, furniture and a balcony? Buy the cheapest light electric. You are done; go to the beginners roundup and pick on price.
A standard driveway or patio, once or twice a year? You want a mid-range electric with decent flow.
A long driveway, or several times a year? Gas, or the very top of the electric range. See electric vs gas.
2. What delicate surfaces do you have?
Vinyl siding, painted wood, composite decking, a car, large windows. The more of these you have, the more a very powerful machine becomes something to manage rather than enjoy.
This does not rule out a capable machine — nozzle choice handles it — but it should stop you buying the biggest thing in budget just because it is the biggest. Check the never-pressure-wash list against your own house before shopping.
3. Electric or gas?
Default to electric. It is quieter, lighter, needs no maintenance, starts instantly and tolerates sitting unused for months. Choose gas only for a specific reason: a large area, frequent use, or no outlet within reach. The full trade-off table is in electric vs gas.
4. What flow rate do you need?
Now the actual specification. GPM, not PSI.
- 1.2 GPM — cars, furniture, small patios. 11-inch surface cleaner maximum.
- 1.6 to 2.0 GPM — the homeowner sweet spot. Drives a 14-inch head, rinses a wall in one pass, foam cannons behave.
- 2.1 to 2.5 GPM — gas territory. 15-inch heads, large areas, fast.
If a listing does not state GPM, treat that as information. Why flow matters more than pressure is worth five minutes before you buy anything.
5. What does it ship with, and what will you still need?
A machine with a complete nozzle set, a gun and a hose is ready to use. A “tool only” listing is not, and the real cost is higher than the price. Then add the three things nearly everyone buys afterwards anyway: a longer hose, detergent and a surface cleaner sized to your flow. Budget for them now rather than being disappointed later — the starter kit page lists them in order.
What to ignore while shopping
Max PSI as a headline. It is measured at trigger-close, not while cleaning. A certified or rated figure is more honest and usually lower.
Nozzle count. Five tips and seven tips clean identically; you will use two of them.
“Commercial grade” on a consumer machine. It means nothing in particular.
Induction versus universal motor marketing. Real, minor, and not what will decide how long your machine lives — freeze damage and dry running will. See the maintenance page.
