11/24/2023 0 Comments Predator 3200 psi pressure washer![]() This is why you need to compare both PSI and GPM when comparing pressure washers. The Sun Joe is the definite winner despite lower PSI. The Stanley has an edge over sun joe in PSI. Let’s assume a Sun Joe XPX 3000 pressure washer with 1.76 GPM and 2030 PSI competes with Stanley SHP2150 pressure washer with 1.4 GPM with 2150 PSI. So, in addition to PSI, you need to compare GPM as well. Smaller engine with less horse power might be more fuel efficient, but still be under powered. But when comparing pressure washers, efficiency is not about less water, but about the work done. In our garden hose comparison above we highlight the efficiency of pressure washers with a lower GPM. Now two pressure washers might have the same max PSI but still not perform the same. For example, Grease on Teflon requires different cleaning pressure than grease on concrete. This is why some people get a great result but others don’t, even with the same pressure washer. Not all surfaces are equal of course, and there are different kinds of contaminants. So the less time it takes to finish, the higher the efficiency is. ![]() When it comes to cleaning capacity of a pressure washer, time is money. ![]() I know, ‘not another acronym!’ but CU’s come up a lot in this discussion because GPM and PSI work so closely together for how much cleaning actually gets done, so we use CU’s as shorthand.Ī pressure washer with 1.3 GPM and 1700 PSI = (1.3 X 1700) = 2,210 CU PSI (Pound per Square Inch) refers to the amount of pressure created by the equipment.ĬU (Cleaning Units) are determined by GPM X PSI. GPM (Gallons per Minute) also called flow rate, is the amount of water delivered by the machine in one minute. And the pressure washer actually got the drive way cleaner… gotta love technology:) Pressure Washer GPM vs PSI So that is 50 gallons with the water hose vs. So you spend another 10 minutes cleaning your driveway… Which is the equivalent of filling up this little guy: This guy’s typical operating specs will be 1450PSI and 1.24 GPM. Now the next day, after the drive way has dried, you see it’s actually not much cleaner you decide to break out your pressure washer. This would be the equivalent of filling up a 50 gallon trash can with water. You take 10 minutes and clean your drive way. But nobody uses just a hose and thumb anymore so we’ll assume you screw on a gun as well and now have 5 GPM and 40PSI. Screw it onto your hose bib, turn on the water and you get 8.55GPM (Thank you Popular Mechanics) and lets call it 10 PSI. So, above I quoted some averages which don’t always give a clear picture. Lets compare what we might find in a typical garage. Pressure washer wins.īut those averages include commercial grade equipment. Sounds like a lot? Your average garden hose uses 12 to 13 GPM! Higher PSI = higher efficiency. a Garden Hose:Īn average pressure washer uses approximately 8 gallons (30.28 Litres) of water per minute, or 8 GPM. How Much Water Does a Pressure Washer Use vs. I am going to show you the facts and some calculations (sorry the math is unavoidable:) about your pressure washer. People end up saying pressure washers are water wasting monsters! But is that true? There are some counter intuitive principles regarding pressure washer physics we should discuss.Īll revolving around this one questions: How much water does a pressure washer use? ![]() Lets look at some examples that show just how efficient your pressure washer really is! How much water does a garden hose use? 8.55 GPM. How much water does a Pressure Washer really use? 1.24 gallons per minute (GPM).
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