Once water reaches 145°F, the thermal relief will activate. Pressure Washers. You shouldn't run hot water through a pressure washer that is not rated for it. When the trigger is not pulled, the water will cycle through the pump, and the heat from the pump will cause the water to heat, which can ultimately burn and melt the internal components of the washer. a ride down the driveway without any work by aiming the pressure washer at the ground behind you and letting the water push you in the opposite direction, like this! Before you go online and order a pressure washer, you need to make sure your water supply can deliver enough pressure for the washer to function properly. FAQ's (Frequently Asked Questions) will help you understand some of the basic concepts of pressure washing systems. Hot exhaust can melt vinyl siding and start fires. Axial pumps, best used for small jobs around the house, are easy to use and require little maintenance. Pressure loses due to friction inside the hose are 5 psi for every 100-feet of hose length. Triplex pumps, ideal for daily or frequent use, need to be maintained but can … Don’t park the pressure washer unit too close to structures. If you cannot switch it off after a minute or three, do not idle the unit for more than five minutes. NO! Always shut down burner first, run for 1-2 minutes or until cold, and then shut the engine down. Leaving your pressure water running will damage its inner workings because as temperature builds up, the pump is at risk of damage. It can get you great results in a short amount of time. You can "boost" pressure into the face of a cheap pump with a 12vDC centrif.pump, and therefore tank feed it, but the moral to the story, is.. Get a better quality Pressure Washer, ..and have a more "sustainable relationship" with your tools. There are pressure washers out there that are specifically labeled as hot water pressure washers. This damage was caused in less than two minutes. In order to get these results though, you must learn how to run a pressure washer off a water tank. 4. NO! The resulting number will help you compare models so you can choose one that will be up to the job.