Collect a load of laundry that requires a double rinse. Set the machine to the largest load size to maximize water flow.
Run the clothing through an ordinary wash-and-rinse cycle with laundry detergent, and wait until the machine shuts off when the cycle is complete.
Turn the wash-cycle dial to "Rinse" and start the cycle. The washing machine will complete a partial cycle, rinsing and spinning the load before shutting off again.