Pressure Washing Resource Center
Pressure Washing Equipment Guides
Gear guides written for people who bill by the job, not by the spec sheet. Which surface cleaner your machine will actually drive, which nozzle belongs on which surface, what to mix for everything pressure alone won't touch, and how all of it decides the rate you can quote.
No affiliate links, no brand rankings — the parts of the decision that survive whatever's in stock this month.
Why a measurement company writes about gear
Because the two ends of this chain are the same conversation. Equipment sets how fast you clean; square footage sets how much there is to clean. Multiply them and you have a price. Most contractors get the first half right and guess at the second.
- Flow decides your cleanerGPM is what spins a surface cleaner bar. Roughly 4 inches of width per GPM — that single ratio sets the widest tool your machine can actually drive.
- Cleaner decides your rateWidth sets production rate. A 16-inch does about 1,000 sq ft an hour on smooth concrete; a 24-inch does closer to 1,700.
- Rate decides your priceHourly target ÷ production rate = price per square foot. Which is why a gear decision is really a pricing decision.
- Square footage decides the jobNone of it produces a quote without the area. That's the number to get right before the rest of the chain means anything.
More on the way
Hoses & Reels
Coming soonHose lengths, pressure ratings, and reel setups that save time on every job.
Belt-Drive vs. Direct-Drive for Daily Use
Coming soonDuty cycle, rebuild intervals, and why the machine that survives a route isn't the one with the biggest numbers.
Maintenance Schedule That Prevents Downtime
Coming soonPump oil, unloader, filters, and winterizing — the intervals that keep a booked week from losing a day.
Equipment questions, answered straight
What to buy first, what actually matters, and what it means for your pricing.
A 4 GPM machine, a 16-inch surface cleaner, 100–200 feet of pressure hose, a reel, a set of nozzles, and safe chemical handling. Flow matters far more than pressure: 4 GPM at 3,000 PSI outperforms 3 GPM at 4,000 PSI on flatwork, because you're rinsing soil away rather than blasting it. Everything past that list is an efficiency upgrade, not a requirement.
GPM, for almost all professional work. Pressure knocks material loose; flow carries it away and determines how fast you cover ground. Contractors use chemicals to break down soiling, which turns the job into rinsing — and rinsing is a flow problem. It's also why GPM decides what size surface cleaner you can run, and therefore what your production rate and your per-square-foot price can be.
Directly, through production rate. The pricing formula is hourly target divided by production rate. A 16-inch cleaner on smooth concrete does roughly 1,000 sq ft/hr, so a $140/hour target needs $0.14/sq ft. A 20-inch does about 1,400 sq ft/hr, so the same target only needs $0.10/sq ft. The wider cleaner doesn't just save time — it lets you quote lower and still earn the same hourly rate.
Used is reasonable for the machine, risky for the pump. Engines are simple and repairable; pumps are the expensive wear item and their condition is hard to judge without running them under load. If you buy used, run it at full pressure with a correctly sized nozzle before money changes hands, and watch for pressure that fluctuates or falls off after a few minutes. Buy nozzles, hoses, and swivels new — they're cheap and they're consumables.
Gear cleans. Quoting wins.
The right cleaner width sets your production rate. Square footage sets the hours. SurfaceMeasure gives you the second number in minutes, from satellite imagery.
More from the Resource Center