LIFAN 6.5HP High Water Pressure Cleaner 3500 PSI Washer AU $405.00 (18 Bids) End Date: Monday Sep-06-2010 19:19:33 EST Add to watch list

NEW 13HP 4350PSI HIGH PRESSURE WATER WASHER CLEANER AU $610.00 (22 Bids) End Date: Monday Sep-06-2010 19:30:07 EST Add to watch list

JETUSA 7.0HP 3800PSI HIGH PRESSURE WASHER WATER CLEANER AU $435.00 (18 Bids) End Date: Monday Sep-06-2010 19:35:44 EST Add to watch list

BRAND NEW 2900PSI HIGH PRESSURE WATER WASHER CLEANER AU $142.50 (8 Bids) End Date: Monday Sep-06-2010 19:58:39 EST Add to watch list

JETUSA 6.5HP 3600PSI HIGH PRESSURE WASHER WATER CLEANER AU $360.51 (11 Bids) End Date: Monday Sep-06-2010 20:00:07 EST Add to watch list

JETUSA 15HP 4800PSI HIGH PRESSURE WASHER WATER CLEANER AU $717.00 (24 Bids) End Date: Monday Sep-06-2010 20:00:37 EST Add to watch list

NEW 7.0HP 3750PSI HIGH PRESSURE WATER WASHER CLEANER AU $285.00 (17 Bids) End Date: Monday Sep-06-2010 20:00:47 EST Add to watch list

BRAND NEW! High Pressure Water Gun Cleaner - Air Tools AU $29.95 End Date: Monday Sep-06-2010 20:04:04 EST Add to watch list

6.5HP High Water Pressure Cleaner Washer 3500psi Turbo AU $191.50 (11 Bids) End Date: Monday Sep-06-2010 20:12:49 EST Add to watch list

HONDA 5.5HP High Water Pressure Cleaner 2900 PSI Washer AU $560.00 (10 Bids) End Date: Monday Sep-06-2010 20:19:39 EST Add to watch list

Portable water pump Pressure Washer cleaner 60W 12V 15L AU $10.00 (5 Bids) End Date: Monday Sep-06-2010 20:21:37 EST Add to watch list

4350PSI HIGH PRESSURE WASHER WATER CLEANER Honda 13HP AU $860.00 (10 Bids) End Date: Monday Sep-06-2010 20:30:04 EST Add to watch list

JETUSA 7.0HP 3800PSI HIGH PRESSURE WASHER WATER CLEANER AU $354.00 (11 Bids) End Date: Monday Sep-06-2010 20:30:18 EST Add to watch list

2900PSI HIGH PRESSURE WASHER WATER CLEANER Honda 5.5HP AU $306.26 (7 Bids) End Date: Monday Sep-06-2010 20:30:39 EST Add to watch list

NEW 7.0HP 3750PSI HIGH PRESSURE WATER WASHER CLEANER AU $405.00 (8 Bids) End Date: Monday Sep-06-2010 20:45:14 EST Add to watch list

HONDA 13HP High Water Pressure Cleaner 4350 PSI Washer AU $937.60 (18 Bids) End Date: Monday Sep-06-2010 21:19:41 EST Add to watch list

5.5hp High Pressure Washer Water Cleaner 2500psi AU $370.00 (16 Bids) End Date: Monday Sep-06-2010 21:41:05 EST Add to watch list

JETUSA 7.0HP 3800PSI HIGH PRESSURE WASHER WATER CLEANER AU $122.50 (10 Bids) End Date: Monday Sep-06-2010 21:50:22 EST Add to watch list

NEW High Pressure Carpet Steam Cleaner Steamer AU $64.95 End Date: Monday Sep-06-2010 22:26:43 EST Add to watch list

JETUSA 7.0HP 3800PSI HIGH PRESSURE WASHER WATER CLEANER AU $182.51 (10 Bids) End Date: Monday Sep-06-2010 22:29:45 EST Add to watch list

Accessory Kit for High Pressure Washer Cleaner AU $59.00 (1 Bid) End Date: Monday Sep-06-2010 23:04:42 EST Add to watch list

Brand NEW 2900psi High Pressure Washer Cleaner, 2000w AU $256.00 (6 Bids) End Date: Monday Sep-06-2010 23:04:44 EST Add to watch list

10 metre Hose for High Pressure Washer Cleaner AU $49.00 (1 Bid) End Date: Monday Sep-06-2010 23:04:46 EST Add to watch list

20 metre Hose for High Pressure Cleaner Washer AU $69.00 (1 Bid) End Date: Monday Sep-06-2010 23:04:49 EST Add to watch list

PETROL HIGH PRESSURE WASHER CLEANER SPARE GUN AU $59.95 End Date: Tuesday Sep-07-2010 2:32:42 EST Add to watch list

NEW 2900PSI HIGH PRESSURE WATER WASHER CLEANER MACHINE AU $105.50 (6 Bids) End Date: Tuesday Sep-07-2010 12:30:30 EST Add to watch list

Pro Cleaner X- 13HP 4350 PSI Commercial Pressure Washer AU $650.00 End Date: Tuesday Sep-07-2010 12:54:56 EST Add to watch list

1800W High Water Pressure Cleaner 1600PSI Water Washer AU $50.05 (13 Bids) End Date: Tuesday Sep-07-2010 13:03:53 EST Add to watch list

PETROL HIGH PRESSURE WASHER CLEANER SPARE GUN AU $59.95 End Date: Tuesday Sep-07-2010 13:27:33 EST Add to watch list

NEW 2900PSI HIGH PRESSURE WATER WASHER CLEANER MACHINE AU $113.50 (4 Bids) End Date: Tuesday Sep-07-2010 15:18:47 EST Add to watch list

PETROL HIGH PRESSURE WASHER CLEANER SPARE GUN AU $59.95 End Date: Tuesday Sep-07-2010 17:55:57 EST Add to watch list

LIFAN 6.5HP High Water Pressure Cleaner 3500 PSI Washer AU $113.50 (6 Bids) End Date: Tuesday Sep-07-2010 19:19:43 EST Add to watch list

JETUSA 7.0HP 3800PSI HIGH PRESSURE WASHER WATER CLEANER AU $68.95 (4 Bids) End Date: Tuesday Sep-07-2010 19:35:22 EST Add to watch list

GERNI 600 PX HONDA WATER HIGH PRESSURE WASHER CLEANER AU $1,199.00 (0 Bid) End Date: Tuesday Sep-07-2010 19:40:06 EST Add to watch list

6.5HP High Water Pressure Cleaner Washer 3500psi Turbo AU $54.00 (7 Bids) End Date: Tuesday Sep-07-2010 19:56:41 EST Add to watch list

BRAND NEW 2900PSI HIGH PRESSURE WATER WASHER CLEANER AU $128.40 (5 Bids) End Date: Tuesday Sep-07-2010 19:58:44 EST Add to watch list

JETUSA 6.5HP 3600PSI HIGH PRESSURE WASHER WATER CLEANER AU $0.99 (1 Bid) End Date: Tuesday Sep-07-2010 20:00:08 EST Add to watch list

NEW 7.0HP 3750PSI HIGH PRESSURE WATER WASHER CLEANER AU $152.50 (4 Bids) End Date: Tuesday Sep-07-2010 20:00:54 EST Add to watch list

BRAND NEW! High Pressure Water Gun Cleaner - Air Tools AU $29.95 End Date: Tuesday Sep-07-2010 20:14:57 EST Add to watch list

HONDA 5.5HP High Water Pressure Cleaner 2900 PSI Washer AU $210.51 (5 Bids) End Date: Tuesday Sep-07-2010 20:19:32 EST Add to watch list

A pressure washer is a mechanical device that uses high-pressure water to remove mold, grime, dust, mud and dirt from surfaces and objects such as buildings, vehicles and concrete road surfaces. Equipment can be rented or bought that produces pressures of up to 5000 PSI (around 345 bar) or more.

The most basic pressure washer consists of:

a motor which directly drives a water pump
high pressure hose
trigger gun
Just as a garden hose nozzle is used to increase the outflowing pressure of the liquid, this machine adds its own power to force high pressure, when a regular nozzle would slow the flow, due to its restricting nature. Note that the pump does not draw more water from the pipe to which the washer is connected than that source can provide; therefore, the water supply must be adequate for a given machine to be connected to it: its flow must be equal or superior to that of the washer, so that the pump is never starved (which can damage it, see Cavitation).

Several different types of nozzles are available, each useful for a particular application. Some nozzles cause the water jet to be ejected in a triangular plane, while others emit a pencil-thin jet of water, which spirals around rapidly. Most nozzles attach directly to the trigger gun.

Some pressure washers, in combination with a particular nozzle, allow detergent to be introduced into the water stream, assisting in the cleaning process. Two types of chemical injectors are available: a low-pressure injector and a high pressure injector.

Pressure washers are dangerous tools and should be operated with due regard to safety instructions. The water pressure near the nozzle is powerful enough to strip flesh from bone. Objects in the water supply can be ejected from the nozzle at great velocities. The cleaning process can propel objects from the surface being cleaned, also at great velocities. Pressure washers have a tendency to break up asphalt if aimed directly at it, due to high pressure water entering cracks and voids in the surface.

Most readily available consumer units (commonly found online or at hardware stores) are electric or gas powered. The electric ones plug into a normal outlet and use/produce cold water, and typically deliver pressure up to about 2000psi. Gas powered units can often deliver twice that pressure, though due to the hazardous nature of the gasoline exhaust they are unsuitable for enclosed and/or indoor areas. Some models can generate hot water, which can be ideal for loosening and removing oil and grease.