The water intake of a pressure washer is most often measured in gallons according to minute (GPM)

https://rapid-wiki.win/index.php/Understanding_Pressure_Washer_Efficiency:_How_Many_Gallons_Per_Minute_Do_You_Really_Need%3F_13814

The water consumption of a stress washing machine is broadly speaking measured in gallons according to minute (GPM). Most residential models latitude from 1.5 to 4 GPM, which suggests how so much water the device expels when operating