The water consumption of a force washer is in general measured in gallons in line with minute (GPM)

https://star-wiki.win/index.php/Understanding_Pressure_Washer_Efficiency:_How_Many_Gallons_Per_Minute_Do_You_Really_Need%3F_67540

The water intake of a force washer is most likely measured in gallons according to minute (GPM). Most residential contraptions fluctuate from 1.5 to 4 GPM, which exhibits how tons water the device expels although operating