Question 1

What PSI pressure washer do I need for a patio?

Accepted Answer

For cleaning patios and driveways, you need a pressure washer with at least 130–150 bar (1,900–2,175 PSI). This provides enough force to remove moss, algae, and embedded dirt from concrete, stone, and block paving. A patio cleaning attachment with a rotating nozzle will give the best results without damaging the surface.

Question 2

Are electric pressure washers as good as petrol ones?

Accepted Answer

For most domestic use, electric pressure washers are perfectly adequate and offer significant advantages: they're quieter, lighter, require less maintenance, and are cheaper to run. Petrol models are better for heavy-duty commercial work, remote locations without power, and tasks requiring sustained high pressure over long periods.

Question 3

Can I use a pressure washer to clean my car?

Accepted Answer

Yes, but use caution. Set the pressure to a lower setting (around 100–110 bar) and keep the lance at least 30cm from the paintwork. Use a wide-angle nozzle or fan spray pattern. Never aim at close range on seals, trim, or tyres. A dedicated car cleaning nozzle kit and snow foam lance will give the best results.

Question 4

What's the difference between bar and PSI?

Accepted Answer

Bar and PSI are both units of pressure. 1 bar = 14.5 PSI approximately. UK pressure washers are typically rated in bar. A domestic washer ranges from 100–170 bar (1,450–2,465 PSI), while professional models go above 180 bar (2,610 PSI). Higher pressure doesn't always mean better — flow rate (litres per hour) is equally important for cleaning efficiency.

Question 5

How long do pressure washers last?

Accepted Answer

A quality domestic pressure washer should last 5–10 years with proper maintenance. Kärcher and Nilfisk models are known for longevity. Key maintenance tips: drain water after use to prevent frost damage, replace O-rings when worn, use a water filter to prevent sediment damage, and never run dry. Store indoors during winter.

Question 6

Which pressure washer brand is best in the UK?

Accepted Answer

Kärcher dominates the UK market and offers excellent quality across all price points. Nilfisk is a strong competitor with slightly better build quality at the premium end. Bosch offers solid mid-range options that integrate with their battery ecosystem. For budget options, Ryobi and Silverline offer decent entry-level models.

Question 7

Do I need a water supply for a pressure washer?

Accepted Answer

Most pressure washers connect to a standard garden hose tap. Some models can also draw water from a water butt or tank using a suction hose — check the manual. The water supply should provide a minimum flow rate (usually 8–10 litres per minute). Never run a pressure washer without adequate water supply as this damages the pump.

Question 8

What accessories do I need for a pressure washer?

Accepted Answer

Essential accessories include: a patio cleaner attachment (rotating surface cleaner) for flat areas, an adjustable nozzle or lance for versatile cleaning, a foam cannon for car washing, extension hoses for larger areas, and a turbo/dirt blaster nozzle for stubborn stains. Most brands offer accessory kits at a discount compared to buying individually.

Feature	Electric	Petrol	Battery
Best for	Cars, patios, general	Heavy-duty, commercial	Quick jobs, portability
Pressure	100–170 bar	150–300+ bar	20–110 bar
Noise level	Moderate	Loud	Quiet
Maintenance	Low	High	Very low
Price range	£70–£500	£200–£2,000+	£80–£400

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