Pressure Washer Guide

Reviewed by Stephen Bettles (Technical Support Engineer, January 2025) 

Pressure washers are highly effective tools that simplify and expedite various cleaning tasks. Whether you're tackling grime on your patio, driveway, or car, a pressure washer can help you achieve a spotless finish efficiently. In this comprehensive guide, we'll delve into what a pressure washer is, explore the different types available, and offer tips on selecting the best one for your specific needs. 

A pressure washer is a dynamic cleaning device that employs high-pressure water to dislodge dirt, grime, and other unwanted substances from various surfaces. They are widely used for cleaning and maintenance in both commercial and residential settings to clean driveways, patios, vehicles, and even buildings. 

A pressure washer operates by pressurising water and expelling it at high velocity through a nozzle. Water is typically drawn from a source such as a garden hose and then channelled through a motorised pump. The pump significantly boosts the water pressure, which is quantified in pounds per square inch (PSI). The source can also be rainwater, or other containers like a bucket or water butt to supply a pressure washer. 

PSI stands for pounds per square inch, a unit of pressure measurement. In the context of pressure washers, PSI denotes the force with which water is expelled from the nozzle. A higher PSI translates to greater cleaning power, enabling you to tackle stubborn dirt and stains more effectively. 

When selecting a pressure washer, consider key factors such as PSI, flow rate, nozzle types, and additional features like adjustable pressure settings or detergent injection.  

Selecting the best pressure washer for your needs involves considering several important factors. One of the most crucial aspects is the cost. Pressure washers can vary significantly in price depending on their features, power, and brand. 

However, it's important to note that the cost of a pressure washer is not the only factor to consider. You should also evaluate the PSI, flow rate, nozzle types, and any additional features that are important to you.  

Wondering how to use a pressure washer? Using a pressure washer safely is paramount to avoid damage to surfaces and injury to yourself or others. Here are some essential safety tips to keep in mind: 

Read the Manual: Before using your pressure washer, thoroughly read the manufacturer's manual. This will provide you with important information about the machine's operation, maintenance, and safety precautions. 

Wear Protective Gear: Always wear appropriate protective gear, including safety goggles, gloves, and sturdy footwear. This will help protect you from high-pressure water jets and any debris that may be dislodged during cleaning. 

Check the Area: Before you start cleaning, inspect the area for any potential hazards such as loose debris, electrical outlets, or delicate surfaces that could be damaged by high-pressure water. 

Maintain a Safe Distance: When using the pressure washer, maintain a safe distance from the surface you are cleaning. This will help prevent damage to the surface and reduce the risk of injury. 

Use the Right Nozzle: Select the appropriate nozzle for the task at hand. Different nozzles offer varying spray patterns and pressure levels, so choose one that matches your cleaning needs without causing damage to the surface. 

Test on a Small Area: Before cleaning a large area, test the pressure washer on a small, inconspicuous spot to ensure it doesn't cause any damage or unwanted effects. 

Follow Maintenance Guidelines: Regularly maintain your pressure washer according to the manufacturer's recommendations. This includes checking hoses and connections, cleaning filters, and storing the machine properly when not in use. 

Browse the extensive selection of cleaning equipment that RS has to offer including pressure washers and pressure washer parts, for a range of different applications.