Prewash is a built-in part of the cycle. Washer names also can be confusing. For example, Wascomats washers are called Giants, Seniors, Super Juniors and Juniors. The standard Wascomat holds 12 pounds. A junior holds one and one-half times the top loader capacity.
Some washers have a water level adjustor.
If employed, it would decrease the gallons per load. This could be an issue. Therefore, it is part of the questionnaire. Not all washers equipped for the same clothes capacity use the same amount of water. For example, a Speed Queen side loader, equipped for 25 pounds of clothes, uses 45 gallons of water.