pump 180 which can operate at different speeds leading to different water pressures and flows a low speed is used for washing up crockery cutlery and glasses and a higher speed is used for pot washing in one embodiment the pump 180 comprises a squirrel cage electric motor comprising two windings where one winding gives a low speed and the other winding gives a higher speed the speed of the water pump and the resulting water pressure should be adjusted to the specific machine and what type of glassware or pots that are going to be cleaned in one embodiment the high water pressure is about 0 8 1 0 atm gauge 1 8 2 0 atm absolute and the low water pressure is about 0 2 0 4 atm gauge 1 2 1 4 atm absolute the water flow is about 800 1100 liters per minute at high pressure and it is about 300 450 liters per minute at low pressure this depends on the specific application and both higher and lower flows are possible the water pump 180 can also be driven by a standard electric motor which is controlled by a speed regulator of a known type such as a frequency changer or a variable frequency drive this is a more costly solution but gives more flexibility and several different speeds and water flows can be chosen the dishwasher 100 comprises a means for detecting if a pot washing basket 140 is placed in the dishwasher in order to automatically separate.