The simplest example, try to empty a bucket on a pipe, you'll have a real struggle, you are gonna be standing there for awhile. Now empty a bucket in a sink, ye

The simplest example, try to empty a bucket on a pipe, you'll have a real struggle, you are gonna be standing there for awhile. Now empty a bucket in a sink, yeah it will fill up and maybe you can do two buckets at once, but after dumping it in one second you can leave it unattended and know that all that water will drain correctly.