What happens if you turn your kitchen sink on? Your drain shouldn’t have a problem draining the amount of water.

Now take a large 5 gallon bucket of water. Dump the whole thing in your sink.

Not only is the amount of water too much for the drain but the volume of water makes it hard for the drain to even function properly.

How long is there going to be water filling in the sink? Eventually, it will all find its way out, but that takes time