How to choose a pressure washer

Good cleaning performance is essential, but what else is important when choosing a pressure washer? Consider the following points before you invest

K What are you cleaning? Think about what you need to clean, how often and how dirty it will get. The higher the pressure that a washer produces, the more power it has to shift stubborn dirt. Pressure is measured in bars, so the higher the bar number, the heavier duty the washer, but the size of the motor, measured in watts, plus the water flow rate, also indicate high performance.

However, although a more powerful machine can lift heavy dirt quickly, a cheaper, lighter-duty washer will still do the job, it will just take longer.

A low power and flow rate are ideal for cleaning delicate surfaces like decking, fencing and block paving, so a smaller machine would suffice. Otherwise, choose a gentle nozzle on a more powerful washer to avoid damage. For larger surfaces, look for a higher bar rating and flow rate to tackle the job quickly.

Do you need accessories? All washers come with a standard nozzle, sometimes two, but specialist attachments will help you get specific jobs done properly. Work out the main jobs you’ll be doing and choose a washer with the relevant accessories – or check they’re available to buy later, at not too high a price. A brush is handy for cleaning furniture, cars and greenhouse glazing, while a patio cleaner will make very light work of surfaces without spraying dirt and grime everywhere. Some washers have an integrated detergent tank, others have a bottle that you fill with diluted detergent and attach between the lance and the nozzle.

Is it ready to use? The amount of assembly required varies – some simply need the lance and hose attaching, but others have to be practically built from scratch, with screwdrivers and Allen keys required. Check before you buy.

Is it easy to move? Pressure washers differ considerably in weight. Make sure a larger model has wheels to help you move it around the garden. Carry-handles in the right places are essential if you have a lot of steps or need to lift the washer up onto a shelf for storage. If you have a large garden, check the hose length to ensure you can reach everything you need to clean. An extension lead that’s suitable for outdoor use will also extend your working area – just make sure you protect it from the spray.

Is it safe? An RCD (residual current device) is an essential extra that automatically switches off the electricity if there’s a fault, preventing an electric shock. Some washers come with one, but if not, buy one separately and plug it into the electric socket before plugging in the washer.

Are cordless any good? Several brands have recently introduced cordless pressure cleaners, powered by lithium-ion batteries and able to work from a bucket of water as well as a hose, so you can use them anywhere. They have a little less power than traditional washers and the battery only has a limited run time, but if you keep it charged they’re very handy for giving greenhouses, barbecues, cars and bikes a quick clean, particularly on the go.