Hmm. Washing machines are not in The Register's standards converter; I'll have to contact them about an addition!
The standard conversion is: How many fridges is this, washing machines are the old Exchequer measurement standard using Rumford corn gallons.
The old UK wine gallon, equal to about 3.6707 × 103 milliliters (mL)
The ancient Rumford quart, equal to about 4.3393 × 103 milliliters (mL)
The corn gallon, equal to 4.4573 × 103 milliliters (mL)
The old corn gallon, equal to 4.4409 × 103 milliliters (mL)
The original Imperial gallon, equal to 4.5435 × 103 milliliters (mL)
The ale gallon, equal to about 4.62 × 103 milliliters (mL)
The Queen Anne gallon, equal to about 3.79 × 103 milliliters (mL)
Currently there are three different gallon units in use, specifically:
The Imperial gallon or gallon (UK), equal to 4.54609 × 103 milliliters (mL)
The US liquid gallon or gallon (US liquid), equal to 3.785411784 × 103 milliliters (mL)
The US dry gallon or gallon (US dry), equal to 4.40488377086 × 103 milliliters (mL)