The pressure pump uses about one third as much water as a mains pressure garden hose (5 versus 15 litres per minute) for much the same washing effect. But you need to be careful not to point the high pressure spray at anything delicate, especially people and pets. Also it will still use a lot more water than a bucket and brush. You still need a brush or a broom for some cleaning (such as getting down wasp nests from buildings).
- Pressure washer available on Amazon.com