The water consumption of a stress washer is more often than not measured in gallons in step with minute (GPM)

https://bbarlock.com/index.php/Choosing_the_Right_PSI:_How_Much_Pressure_Washer_Power_Do_You_Need_to_Effectively_Clean_Your_Deck%3F

The water intake of a tension washer is aas a rule measured in gallons in step with minute (GPM). Most residential instruments number from 1.5 to 4 GPM, which shows how tons water the system expels while operating