After about 15 min. Continuous operation performance can, however, for something. So if you have to make larger areas, should be considering buying a little more generous sized device. Example: Karcher Pressure Washer X-Range 4.650 T 250 Jubilee
For easy cleaning in the small garden but the unit is good.
Edit my original 19.06.2012:
A hose for automatic suction of detergents is in the guide is but, the cleaner with the rotary nozzle lance -The included - not to be used. So who is basically satisfied with the performance of the smallest unit, but want to clean with detergent, should take the packet with the second additional = normal lance. Costs about 10 euros more. Karcher 1.673-104.0 Pressure Washer X-Range 2.120
If necessary not right ? See comment from 16.06.2012!