7 Best Pressure Washers for 2020 in the UK

Best Cheap
Kärcher K2 Full Control Home Pressure Washer
Value-for-Money
Kärcher K4 Full Control Home Pressure Washer
Best of the Best
Kärcher K7 Premium Full Control Plus Home Pressure Washer
Title
Kärcher K2 Full Control Home Pressure Washer
Kärcher K4 Full Control Home Pressure Washer
Kärcher K7 Premium Full Control Plus Home Pressure Washer
Rating
Model
1.673-405.0
1.324-005.0
1.317-136.0
Water Pressure
110 bar / 1595 PSI
max. 130 / max. 13 (bar/MPa)
max. 180/ max. 2611 (bar/PSI)
Dimensions
23.1 x 11 x 9.7 inches
12 x 23 x 15.6 inches
18.2 x 26.3 x 13 inches
Price
£99.99
£243.06
£473.37
Best Cheap
Kärcher K2 Full Control Home Pressure Washer
Title
Kärcher K2 Full Control Home Pressure Washer
Rating
Model
1.673-405.0
Water Pressure
110 bar / 1595 PSI
Dimensions
23.1 x 11 x 9.7 inches
Price
£99.99
Value-for-Money
Kärcher K4 Full Control Home Pressure Washer
Title
Kärcher K4 Full Control Home Pressure Washer
Rating
Model
1.324-005.0
Water Pressure
max. 130 / max. 13 (bar/MPa)
Dimensions
12 x 23 x 15.6 inches
Price
£243.06
Best of the Best
Kärcher K7 Premium Full Control Plus Home Pressure Washer
Title
Kärcher K7 Premium Full Control Plus Home Pressure Washer
Rating
Model
1.317-136.0
Water Pressure
max. 180/ max. 2611 (bar/PSI)
Dimensions
18.2 x 26.3 x 13 inches
Price
£473.37

Table of Contents

Top 3 Best-Sellers right now

SaleBestseller No. 1
Kärcher K2 Full Control Home Pressure Washer
1,937 Reviews
Kärcher K2 Full Control Home Pressure Washer
  • Full control lances with iconography guide users on which pressure setting should be used where.
  • Detergent application direct from the machine, using a suction tube.
  • T150 Patio cleaner is perfect for cleaning large areas of Patio, Decking and Block paving.
  • On-board storage: Telescopic handle, and storage for the high pressure gun, high pressure hose, full...
SaleBestseller No. 2
Bosch EasyAquatak 110 High Pressure Washer
332 Reviews
Bosch EasyAquatak 110 High Pressure Washer
  • Highly efficient motor pump producing quick and effortless cleaning performance.
  • Compact, portable design with a broad base for extra stability and storage for all accessories.
  • Simple push fit connections for quick and easy set up.
  • Includes variable power and rotary nozzles for deeper cleaning.
Bestseller No. 3
Kärcher K2 Premium Full Control Car and Home Pressure Washer
497 Reviews
Kärcher K2 Premium Full Control Car and Home Pressure Washer
  • Full control lances with iconography guide users on which pressure setting should be used where
  • Detergent application direct from the machine from the on-board detergent tank
  • The accessories included are ideal for cleaning large areas of patio, decking and block paving as...
  • On-board storage: Telescopic handle and storage for the high pressure gun, high pressure hose, full...

1. Kärcher K2 Full Control Home Pressure Washer – The Cheap Choice

Introduction

We start our list with probably the best entry-level pressure washer. Easy to use and move around, reliable, and affordable, it is perfect for cleaning your car, patio, deck or pieces of furniture.

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At a Glance

  • Brand: Kӓrcher
  • Model: 1.673-405.0
  • Power Source: Corded Electric
  • Water Pressure: 110 bar / 1595 PSI
  • Water Flow: max. 6 l/m – 360 l/h
  • Wattage: 1400 Watts
  • Motor: Air-cooled
  • Voltage: 240 volts
  • High Pressure Hose length (m): 6
  • Weight without accessories (kg): 9.7 lbs
  • Dimensions: 23.1 x 11 x 9.7 inches (58.6 x 28 x 24.6 cm)
  • Pressure (bar/MPa): max. 110 / max. 11
  • Cord Length: 15 feet (5 metres)
  • Measurement System: Metric
  • Included Components:
    1 x K2 Full Control Home
    1 x Full Control Vario Lance with 4 Predefined settings with usage iconography
    1 x Full Control Dirt Blaster with usage iconography
    1 x 4m High-Pressure hose with Quick Connect
    1 x High-Pressure Trigger Gun
    1 x T150 Patio Cleaner
    1 x 500ml Ready to use Patio & Deck Detergent
  • Detergent Application: Suction Tube
  • Home Kit Included
  • Warranty: 2 Years

Design & Features

K2 has been around for many years, but this edition is the latest and has some nice design upgrades while keeping the specs, which were already pretty good.

The two most important features, which are actually used to differentiate between consumer, semi-pro and pro pressure washers, are water pressure and water flow. And as you can easily see from the table of our buying guide below, K2 is a great entry-level pressure washer for domestic, moderate use (once a week for example).

Portability is surely one of its pros: weighing less than 9.7 lbs and equipped with a pair of wheels on the base, it can be easily moved around, while the telescopic handle, combined with the built-in niche for the high-pressure gun, hose, lances and power cable, makes storage easier. The only issue, of course, is the power cord: despite being pretty long, it still requires you to be close to a power supply or use a cable extension if you want to work away from your house.

Another great feature is the Vario lance, which comes with 4 settings (Mix, Soft, Medium and Hard) for easier adjustment depending on what you want to do: Mix is for mixing detergents with the suction tube, Soft is great for cleaning woodwork, Medium for cleaning your car, and Hard for really stubborn stains, like motor oil leaks on the pavement.

The motor comes with an in-built air cooling mechanism, which helps a lot in extending work-life of its components. Other nice features include the automatic Start/Stop mechanism, the shockproof twistable rubber-coated On/Off switch, and the detergent pipe, designed to help you out with really murky dirt.

Its price seems all the more appealing if you consider the accessories it comes with, among which the full control Lance, the dirt blaster (with a rotating nozzle for even greater water pressure), and the High-Pressure Hose.

Pros
  • Excellent price
  • Reliable
  • Portable and lightweight
  • Well-equipped
  • Nice water pressure and flow for a consumer model
Cons
  • Not for frequent use or heavy-duty cleaning
  • Corded

Our Opinion

A truly excellent budget-friendly and entry-level model, K2 comes well-accessorised and will easily tackle all usual DIY house cleaning chores.

2. WORX WG629E.1 18V 20V MAX Cordless HYDROSHOT Portable Pressure Cleaner

Introduction

The WG629E.1 stands out not just for its price, but also for not having a water tank! So, if portability is your top priority, then this a no-brainer.

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At a Glance

  • Brand: WORX
  • Number: WG629E.1
  • Power Source: Electric, Wireless
  • Water Pressure: 320 PSI (22 Bar)
  • Dimensions: 23.6 x 22 x 13.4 inches (60 x 56 x 34 cm)
  • Charging time: around 5 hours
  • Battery: 20 V 2.0 Ah
  • Machine weight: 3.7 lbs (1.68 kg)
  • Batteries: 1 Lithium-ion battery
  • Style: Hydroshot – 629E Full Kit
  • Power Source: Battery-powered
  • Voltage: 20 volts
  • Measurement System: Metric
  • Included Components:
    1 x 20V 2.0Ah Battery Pack
    1 x Charger
    1 x 6M Hose
    1 x Cleaning brush
    1 x Soap bottle
    1 x Foldable Water Bucket
    1 x Long Lance
    1 x Short Lance
    1 x Multi-spray nozzle
    1 x Carry bag

Design & Features

When the WG629E.1 first came out, it changed everything in the pressure washer market with its revolutionary design and minimalistic philosophy, aiming at taking up an as little place as possible and maximising portability.

It combines a tank-less design with a smart battery-powered jet-wash lance and a 10-metre hose, for maximum ease of use, wherever you may be. The most amazing thing of all, the integrated water filter, which allows you to use water any type of water source, such as streams and ponds.

If the lack of a water tank troubles your mind, keep in mind that you can easily make up for it with a bottle, a barrel or a bucket – in fact, a folding bucket is included in the package. So, if there is water out there, then you can use it. Needless to say, the cleaner the water you use, the longer the life of the filter.

The Hydroshot lance has three pressure settings, while the nozzle can rotate into five different spray patterns to widen or narrow the spraying.

Obviously, compactness and portability take a toll on power. The WG629E.1 claims 2.5Mpa water pressure (about 25bar), which means it is not designed for heavy-duty cleaning, but it is perfect for gardening, car- and bike-cleaning and for refreshing your patio or windows. It is certainly much more powerful from a garden hose, and it will rid of most of the usual dirt, but for heavy-duty work or really stubborn stains, you will probably need something more powerful.

Worx’s WG629E.1 is powered from a 20V MAX lithium-ion battery, which gives you ample time for most everyday chores and can be ready to work again in around 5 hours.

Pros
  • Compact and highly portable
  • Allows you to use any kind of water source
  • Cordless
  • Affordable
Cons
  • It requires a water source
  • It is just for daily chores

Our Opinion

Lightweight, portable, easy to use (provided you have some type of water source around), the Worx WG629E.1 will easily cater to your weekly cleaning or gardening needs – at an amazingly low price.

3. Bosch Universal Aquatak 135 High-Pressure Washer

Introduction

Bosch needs no introduction; being one of the most widely-known and reliable manufacturers, its brand instantly denotes robustness and efficiency. Let us see about the rest.

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At a Glance

  • Brand: Universal Aquatak
  • Model: 06008A7C70
  • Weight (net/gross): 17.4 / 23,1 lbs (7.9 / 10.5 kg)
  • Product Dimensions: 17.4 x 14.7 x 14.2 inches (44.2 x 37.3 x 36 cm)
  • Pressure: 1958 PSI (135 bar)
  • flow rate: 410 l/h
  • Motor power: 1900 W
  • flow temperature: 40 °C
  • Hose: 21 feet (7 metres)
  • Cable length: 15 feet (5 metres)
  • Power Source: Corded electric
  • Measurement System: Metric
  • Included Components:
    1 X Universal Aquatak 135
    Bosch High-Pressure Gun
    Lance
    3-In-1 Nozzle
    High-Pressure Detergent Nozzle, 450 Ml
    7 M High-Pressure Hose
    Water Filter

Design & Features

The design is pretty standard in this model. A large water tank allows you to work even away from water sources. Its winning traits are its force (for a consumer pressure washer) and ease of use, which make usual cleaning projects a breeze; a loud one though, keep that in mind!

The 3-in-1 nozzle affords an improved pressure, as well as a better concentration on really small spots. Of course, you can adjust it to a rotary mode, or a fan spray If you want to clean faster larger areas. Mind the lance trigger lock, though, for it seems (because it is) a bit feeble.

Design-wise, there is also a handy detergent bottle that can be attached to the nozzle, dispensing detergent smoothly and evenly during the washing phase. It comes with a 5-metre cable length, which is usually enough for car cleaning and house refreshing.

In addition to that, there is a nice plastic adapter fitting on the front of the pressure washer, designed to facilitate the connection of the hose and minimise the risk of breaking it over the course of time. Just make sure to attach it properly.

Storage-wise, the telescopic handle can be easily folded, the hose detaches easily, and the nozzle can be dismantled for easier storing.

Pros
  • Robust casing and reliable motor
  • Compact
  • Powerful enough for commercial use
  • Value for money
Cons
  • A bit loud during operation
  • Lance trigger lock could use an upgrade

Our Opinion

Boasting reliability and efficiency, Bosch’s Universal Aquatak 135 is an excellent pick for domestic use and consumers that don’t mind its loud yet powerful motor.

4. Wilks-USA RX550i Highest Powered Electric Pressure Washer

Introduction

Wilks RX550i takes us several notches up, to models that could be used also by professionals as well as home-owners. Amazingly powerful and with a 26-metre hose, it affords great cleaning might and ease of use to its user. Still, it boasts far more pros than these.

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At a Glance

  • Brand: Wilks USA
  • Model: RX550i
  • Water Pressure: 3800 PSI / 262 bar
  • Continuous Water Pressure 2250 PSI / 155 Bar
  • Water Flow: 510 LPH
  • Weight: 66 lbs (30 Kg)
  • Dimensions: 42.5 x 15.7 x 15.7 inches (108 x 40 x 40 cm)
  • Style: Stand Alone
  • Power Source: Corded, Electric
  • Hose Length: 78 feet (26 Metres)
  • Power Cable Length: 15 feet (5 Metres)
  • Voltage: 240 volts
  • Wattage: 3000 watts
  • Constant Induction Motor: 3000W Peak / 2500W
  • Max Water Temperature: 50°C
  • 1L Detergent Tank / Standard UK 3 Pin Plug
  • Include components:
    Lance
    Gutter Lance
    5 X Varying Nozzles
    Turbo Wand
    Fixed Brush
    Rotary Brush
    Patio Cleaner
  • Warranty: 2 years

Design & Features

The first thing we should note about Wilks’ RX550i pressure washer is excellent construction quality and motor might. With a 3000-watt motor, it generates a monstrous 510 l/h water flow, which makes it ideal even for the stubbornest stains on pavements, decks and patios.

Maximum pressure washer reaches 3800 PSI (more than 260 bars), but its continues pressure is around 155 bars – which is still very powerful and adequate for most heavy-duty cleaning projects. The problem is that you cannot reduce it to less than that, which means that it can’t be used for more sensitive surfaces.

Its design for heavy work is easily surmised by the amazing length of its hose – which can be extended, with the included attachment, to 26 metres. This makes it an ideal option for professionals, people who want to clean large areas around their property, as well as truck owners. Keep in mind that it also has a 5-metre power cable too.

Regarding its design, aside from the large onboard detergent tank, you have a pair of wheels that are absolutely necessary for moving it around, since it weights by itself already 66 lbs.

You get 5 different nozzles, adjusting the spray pattern to your needs. You can easily change nozzles too.

Last, we should mention the great number of attachments, parts and fittings included in the package, forming a truly impressive kit, covering any possible cleaning need. The accessories include a gutter lance, a turbo wand, a pair of brushes, as well as a cleaner designed especially for patios.

Pros
  • Sturdy and reliable
  • Amazingly long hose
  • Easy to use
  • Powerful motor
  • Numerous attachments
  • Excellent price
Cons
  • It would be nice if the water pressure could drop below 155 bar
  • A bit heavy

Our Opinion

Mighty, easy to use, efficient, and well equipped, the Wilks-USA RX550i takes you to a semi-professional level at a very reasonable price.

5. DEALOURUS TX-PRO 2020 Petrol Pressure Washer

Introduction

A relatively new brand, Dealourus UK has already gained a reputation for its excellent models. The TX-PRO 2020 stands out for its 8.0-horsepower petrol engine, affording amazing might, without deafening the neighbours.

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At a Glance

  • Brand: Dealourus
  • Model: TX-PRO 2020
  • Maximum Water Pressure: 3950 PSI (272 Bar)
  • Continuous Water Pressure: 3000 PSI (207 Bar)
  • Water Flow Rate: 720 LPH
  • Engine Type: 4-stroke OHV Engine
  • Output: 8HP (5.25 kW) / 3600 rpm
  • Fuel Capacity: 3.5 Litres
  • Fuel Type: Regular Unleaded 95+ RON
  • Pump Type: Exclusive Axial Titanium alloy (Black Series)
  • Pump Oil: SAE 15W-30
  • Power System: Petrol
  • Engine Displacement Range: 210cc
  • Starting System: Recoil Pull Start
  • Hose Length: 60 feet (20 metres)
  • Detergent Bottle: 4.0 Litres
  • Max Water Temperature: 40°C
  • Oil Sensor safety switch
  • Included Components
    Petrol Pressure Washer

Design & Features

Another semi-professional model, the TX-PRO 2020 combines power and portability. You can take it anywhere and use it even in properties and places without electricity – which is a major advantage for people that love the countryside.

From this point of view, note the 20-metre hose, which allows you to work at a rather large area, as well as the pair of the 10-inch wheels that ensure easy transport even in rough terrain.

Its brass axial pump (for faster access to the hose connection) and almost 4.000 max PSI water pressure afford the TX-PRO 2020 enough power to tackle heavy-duty cleaning tasks, which can be harnessed and properly focussed with the 5 different nozzles and spray settings. Be it your weekly (or monthly!) car wash, patio and deck cleaning, or even removing grime from under the eaves and old motor oil stains from your garage floor or pavement, it will do it in a flash.

The pressure washer is equipped with a 3.5-litre fuel tank and a built-in 4-litre detergent bottle – much bigger than usual, but allow you to work for a considerable amount of time without having to refill.

For a petrol pressure washer, the TX-PRO 2020 is not as loud as we would expect, but it is louder than most of its electric competitors. Still, its motor is much more robust and durable.

Pros
  • Great power
  • Compact and portable
  • Ideal for the country-side
  • Petrol-powered motor
  • Durable
Cons
  • A bit loud

Our Opinion

The Dealourus TX-PRO 2020 is robust, powerful, petrol-powered – and ideal for the countryside.

6. Kärcher K4 Full Control Home Pressure Washer – Value-for-Money

Introduction

We close our list with a brand that considered by many, especially professionals, as the leading firm when it comes to pressure washers. Kӓrcher has launched several models in multiple editions – and K4 is one of the most popular.

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At a Glance

  • Model: Kӓrcher
  • Number: 1.324-005.0
  • Weight without accessories: 25.1 lbs (11.4 kg)
  • Dimensions: 12 x 23 x 15.6 inches (30.5 x 58.4 x 39.7 cm)
  • Batteries: 2 AAA batteries (included)
  • Water Pressure (bar/MPa): max. 130 / max. 13
  • Water Flow rate (l/h): max. 420
  • High-Pressure Hose length: 18 feet (6 metres)
  • Detergent Application: Plug ‘n’ Clean
  • Home Kit Included
  • Style: Stand Alone
  • Power Source: Corded-electric
  • Voltage: 240 volts
  • Wattage: 1800 watts
  • Flow Rate: 420 litres per minute
  • Cord Length: 15 feet (5 metres)
  • Accessory Connection Type: Quick Connect
  • Grit Description: 0 litres per minute
  • Included Components:
    1 x Vario Lance
    1 x Dirt Blaster spray lance
    1 x T350 patio cleaner
    1 x 1L bottle of Stone and facade cleaner
    2 x AAA batteries.
  • Battery Cell Type: Alkaline
  • Warranty: 3 years

Design & Features

Kӓrcher K4 is another semi-professional pressure washer, which is exceptionally efficient in all types of dirt and mud – which makes it perfect for the countryside and areas with rainy weather.

This particular model has all sorts of nice design additions, the best of which is the water pressure adjustment barrel: the user can adjust the pressure of the water by twisting it, which means that, combined with the proper spray lance, you can easily use it against any given surface, no matter its sensitivity.

There are three pressure levels, plus a special detergent setting. Note, also, the 1-litre Plug ‘n’ Clean Detergent, which is designed especially for stubborn dirt and stone surfaces. In a matter of seconds, you can replace it and start or keep on working.

K4 is also surprisingly quiet, despite its powerful motor.

Another great extra (which we haven’t seen in any of the previous models), is the LED display on the trigger that informs you of the power required for your task and guides your selection of the pressure setting. This maximises the efficiency and minimises the risk of damage on a sensitive surface or paintwork.

So, efficiency is pretty much assured. Now, storage is rather easy too. The trigger gun and the spray lances can be stored on the machine, thus saving storage space (a feature not found in most of its competitors), while the pair of high impact wheels and the foldable telescopic handle makes moving around very easy. True, the storage section is a bit flimsy, but with a little caution, it serves its purpose.

Last but not least, the surprisingly long warranty (3 years) deserves a mention.

Pros
  • Easy to use
  • LCD for maximum efficiency and safety
  • Quiet operation
  • Value for money
  • 3-year warranty
Cons
  • Storage section could use an upgrade

Our Opinion

A truly well-designed and efficient pressure washer, K4 has the whole package and is ideal both for domestic and semi-professional use, at a very reasonable price.

7. Kärcher K7 Premium Full Control Plus Home Pressure Washer – The Best Choice

Introduction

We close our list with Kärcher’s K7 Premium Full Control Home Pressure Washer. K7 has been a very popular model for years but now comes with a new design and some great new features.

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At a Glance

  • Brand: Kärcher
  • Model: 1.317-136.0
  • Item Weight: 39 lbs (17.7 Kg)
  • Water Pressure (bar/PSI): max. 180/ max. 2611
  • Water Flow Rate (l/h) max.: 600
  • High-Pressure Hose length: 30 feet (10 metres)
  • Built-in hose reel
  • Detergent Application: Plug ‘n’ Clean
  • Home Kit Included
  • Dimensions: 18.2 x 26.3 x 13 inches (46.3 x 66.7 x 33 cm)
  • Batteries: 2 AAA batteries (included)
  • Power Source: Corded Electric
  • Voltage 240 volts
  • Wattage 2800 watts
  • Cord Length: 15 feet (5 metres)
  • Measurement System: Metric
  • Included Components
    1 x Full Control Plus Trigger Gun with power adjustment buttons
    1 x 3-in-1 Multi-use spray lance
    1 x 10m High-Pressure hose with Quick Connect
    1 x T450 Patio Cleaner for large areas of Patio & Decking
    1 x 1L 3-in-1 Stone & Façade Cleaner
  • Battery Cell Type: Alkaline
  • Warranty: 5 years

Design & Features

Easy to assemble and even easier to use, K7 is very easy to move around despite its almost 40 lbs, mainly because of its telescopic aluminium handle and robust wheels.

On the back, you will find a reel holding a 10-metre long high-pressure hose, which is easily pulled out and reeled back in when not in use. To the front, there are spots for securing the lances and trigger guns for easier storage and transportation. The handles allow you to wash easily vertical surfaces. This particular model also has rubber coating over the switches for even greater safety regarding electricity.

One of the best traits is the built-in water cooling mechanism that cools the motor and maximises its work-life. A set of pipes ensures that the water moves around the motor before being ejected from the nozzle, cooling it down.

There is no reason to jabber about K7’s water pressure and flow; a mere gander at the specs speaks for itself. Just note that you can clean up to 60 square metres in less than 60 minutes. K7 also has a mighty T450 patio cleaner, which can be used with an extra flat nozzle that makes this particular task much easier.

The pressure washer is also equipped with an additional detergent regulator switch, which controls how much detergent is used, depending on your preferences. This model is also environmentally friendly, saving you both water and energy (around 20%) at the eco-friendly setting.

Like the previous model we mentioned, there is a LED display trigger gun, which makes sure you use the optimum settings for each task, for maximum efficiency and minimum danger of dents or other types of damage.

Accessories wise, you get a Vario Lance, designed to regulate easily the water depending on the task in hand, the so-called “Dirt Blaster”, the afore-mentioned patio cleaner, and, of course, the high-pressure hose.

Last, K7 boasts an amazing 5-year warranty – ample proof of the model’s reliability and construction quality.

Pros
  • Reliable and durable
  • Easy to use
  • LCD for maximum efficiency and safety
  • Quiet operation
  • Value for money
  • 5-year warranty
Cons
  • The price is reasonable for what you get, but it is not exactly “budget-friendly”

Our Opinion

Coming from a great brand, boasting amazing power, prime construction quality and a rather reasonable price, Kärcher K7 is hands down the best pick of our list.

Pressure Washer Buying Guide

Why Should I Buy a Pressure Washer?

Pressure washers are designed to break up and remove dirt, mould and other types of debris that are firmly attached to a given surface. Water is an excellent solvent, and the high pressure multiplies its efficiency.

Just think of a motor oil stain on your pavement, hardened shoot and carbonized debris on the grill, and dust all around the grilles – and the hours of work required for removing it properly. This is all the reason you need to buy a pressure washer.

A well-designed pressure washer will clean almost any type of hard surface, when operated properly: patios, decks, car, window frames, glass, metallic panels, walls, roofs – you name it, can easily get dingy because of the weather, mould, and dusty wind; and a pressure washer is the perfect tool have them shinning clean again. You just have to make sure that the surface you use it on is not going to be damaged, scratched or dented.

But how can you pick a pressure washer with the best combination of features without overstepping the boundaries of your budget? The following tips will make it easier for you.

Understanding How a Pressure Washer Works

The best way to buy the best possible pressure washer for your needs is to understand how they work.

Let us start from some key terms.

  • Pounds per Square Inch (PSI): PSI is the unit measuring water pressure. The higher this number, the easier to get off the stains, but also the higher the possibility to damage a sensitive surface.
  • Litres Per Minute (LPM): LPM is the unit measuring water flow. The higher this number, the more surface area you can clean in a given amount of time.
  • Cleaning Units (CU): CUs is the combination of pressure and water flow. The higher it is the less time you need to clean properly a given surface. If a model does not contain this measurement, you can easily estimate by yourself, by multiplying the PSI by the LPM (PSI x LPM = CU).

How does a pressure washer work?

A pressure washer uses a sophisticated pump to increase the pressure by which it dispenses water while reducing the amount of water used. You can see the same result by just putting your thumb in front of the hose. The pump of a pressure washer uses, more or less, the same idea.

It can increase the water pressure from 40 PSI (pounds per square inch) to 1,000 – 4,000 PSI – which is what you need to remove persistent dirt from a hard surface.

There are basically two types of pumps used in pressure washers, axial pumps and triplex pumps.

Axial pumps are very easy to handle, require minimum maintenance, and are ideal for the usual daily chores around the house. They don’t last for too many years though, especially when frequently used.

Triplex pumps, on the other hand, are designed for optimum, heavy-duty performance. They do require some maintenance, but they last for many years not matter how frequent the use.

In most cases, these pumps have two joints or connection points, one for low and one for high pressure.  The first one is for attaching the standard hose for gardening, while the other one accepts a pressure washer hose connected to a hand-held pressure washer wand. The spray pattern is controlled by the nozzle you use.

What are the Types of Pressure Washers?

One way to categorise pressure washers is by their power source, which is usually electricity or gas, each with its own pros and cons. Electrical pressure washers feature ease of use, autonomy, easy maintenance and portability, whereas gas pressure washers are usually much more powerful and designed for heavy-duty work.

Another way to categorise pressure washers is, of course, their targeted projects or buyers. As with almost all appliances, there are pressure washers designed mainly for consumer and others for professional use. The following table provides some insight:

Type of Pressure washerConsumerSemi-ProProfessional
Water TemperatureColdColdCold/ Warm/ Hot
PSI500 – 4,0001,000 – 4,2001,000 – 7,000
LPM3.8 – 15.03.8 – 15.03.8 – 37.8
CU1,900 – 60,0003,800 – 63,0003,800 – 264,600

 

Let’s break that down:

  • Consumer Pressure Washers

Affordable and easy to use even for totally inexperienced users, consumer pressure washers are equipped with a consumer-grade engine and pump and are designed strictly for domestic use, which means for at most for weekly use and for projects like washing a car and cleaning your patio and deck.

  • Semi-Pro Pressure Washers

Semi-pro power washers are actually domestic models with upgraded durability and better performance, usually equipped with a professional pump and a consumer engine, or a professional engine and a consumer pump. A DIY user that opts for such a model will never have any issue with it, but he/she will have to pay a premium. Professional could also use them for lighter-duty projects.

  • Professional Pressure Washers

Professional pressure washers offer maximum performance and durability but come with a pricey tag. Don’t be fooled by PSI, GPM or CU numbers that may be equal to those of a consumer or semi-pro pressure washer. The key lies in the durability of each and every one of their parts. They can work for hours day after day without breaking down.

What Should I Consider Before Buying a Pressure Washer?

Always check the amps required to power the model you plan to buy.

Opt for a pressure washer with a ground fault interrupter inside the cord – it will make things much easier for you.

If your cleaning needs are more demanding, pick a pressure washer equipped with an electronic fuel injection (EFI). It makes starting a lot easier and saves you energy.

After Buying a Pressure Washer…

Read carefully the manual, especially the part regarding the surfaces it can be used and the precautions you must take. The last thing you want is to damage the surface or coating of a precious object or part of the house.

This is even more important if your project requires the use of a detergent. Most pressure washers come with certain recommendations you need to consider.

Make sure to apply a pump protector after using the pressure washer; it lubricates the seals of the pump and prevents the accumulation of corrosive debris and ice inside the machine, thus maximising its work-life.

We hope all these tips will help you out.