The time it takes for water to drain out of a top-loading washer after turning it off and unplugging it can vary depending on the specific model and the design of the washer. Typically, top-loading washers have a drain pump that helps remove excess water from the drum.
In most cases, the water should start draining immediately once you turn off and unplug the washer. It may take just a few seconds to a minute for the water to completely drain out, assuming there are no clogs or issues with the drain pump.
If the washer is functioning properly and the drain system is clear, you can speed up the draining process by manually engaging the spin cycle before turning off the washer. This will help force out the water more efficiently.
Keep in mind that the draining time may also depend on how much water is left in the drum at the time of shutting off the washer. If the washer just finished a cycle, there might be more water present, whereas if you manually drained some water before turning it off, the process will be faster.
If you find that the water is taking an unusually long time to drain, it could be an indication of a problem with the washer's drain pump or drainage system. In such cases, it's best to refer to the washer's user manual or contact the manufacturer for assistance.