How Pressure Washers Work

Ever wondered how your pressure washer transforms water into a dirt-destroying weapon? In this article, we'll provide a step-by-step breakdown of how pressure washers work, demystifying the process that turns water into a high-pressure cleaning dynamo. Whether you're a seasoned user or new to the world of power cleaning, join us on a quick tour through the key components that make pressure washers the go-to solution for a pristine clean.

1. Water Supply:

• The pressure washer is connected to a water source, typically a garden hose at home or a more professional-looking alternative in commercial or industrial settings.
• This is where the water begins its journey into your pressure washer.

2. Pump System:

• The pressure washer has a pump that pressurises the water.
• This pump is typically powered by either an electric motor (see: Ehrle Range) or an engine (see: NPC range), depending on the type of pressure washer.

3. Pressure Buildup:

• The pump speeds up the rate at which water is pulled into your machine and forced out the other end of the pump and into the hose running to your trigger gun.
• This increased speed translates to increased force, eventually creating pressure.
• Note: It's crucial to have a pressure washer that doesn't outstrip your water supply, either by ensuring a good water flow rate or using a breaker tank.

4. Hose and Nozzle Attachment:

• At the end of the hose, there is typically a gun and lance. 
• The lance has a nozzle at the end.
• The nozzle has a small hole in it, creating a bottleneck for the water to pass through.
• The increased rate (or force) of the water-flow from the pump pushes it through the hose toward and through the nozzle.

5. High-Pressure Spray:

• Assuming you have your trigger pulled, water is allowed to continue its rapid journey toward the nozzle.
• Forced through the small hole in the nozzle, the water is pressurised as it tries to escape through the hole.
• Water exits the nozzle as a pressurised spray or jet of water.

6. Cleaning Action:

• The water, pressurised by the pump leaves the nozzle as a jet of water.
• The pressure increases the speed of the water exponentially, increasing the force at which the water hits dirt and grime.
• Assuming the pressure is great enough, the jet of water will break up and remove the dirt and grime.

7. Adjustable Pressure/Water Flow (Optional):

• Many pressure washers have adjustable pressure settings.
• These typically reduce the power output of the pump, reducing the amount of water that is pulled through the pressure washer (see 2).
• The reduced water flow reduces the force at which the water is pushed through the nozzle.
• The reduced force lowers the pressure.

8. Detergent Injection (Optional):

• Some pressure washers have a detergent tank or an attachment for adding cleaning solutions.
  • Many of these attachments have larger nozzles, reducing the pressure (see: chemical foamer) at low pressures.
  • The Ehrle range, such as the KD premium range, inject chemicals into the water flow. These mean chemicals can be applied under pressure, keeping up that dirt blasting capability!
• Chemicals are useful for breaking down dirt, grime and particularly traffic film.

9. Steam Cleaning (Optional)

• Some pressure washers also include a burner for heating water.
• The Ehrle HD and HSC range, for instance, can heat water to 150°C.
• Heat can help break down dirt and grime.

10. Automatic Shut-Off (Optional):

• Certain pressure washers are equipped with automatic shut-off features that stop the motor or engine when the trigger is released. 
• This helps conserve energy and prolong the life of the machine.

In a Nutshell: Decoding Pressure Washer Power

From water inlet to high-pressure spray, we've unravelled the secrets behind the cleaning prowess of pressure washers. Whether you're a seasoned user or a newbie in the realm of power cleaning, understanding this process reveals the precision in every drop. The adjustable pressure, optional detergent boost, and automatic shut-off features add versatility to its might.

Ready to elevate your cleaning game? Explore our range of advanced pressure washers, designed to unleash precision and efficiency in every spray. Whether you're in the industrial, commercial, or residential sector, discover the perfect cleaning companion tailored to your needs. Visit our product page now to browse our cutting-edge models and take the first step toward a spotless, pristine clean. Or, if you would like advice, give us a ring at 01652 659 759 or send us an email via our contact form or a message via messenger (see facebook messenger icon in bottom right).