Siphoning from a fermenting carboy to a clarifying carboy, and from the clarifying carboy to a bottling bucket is part of the process of home-brewing. The movement of the fluid into other containers is caused by using a pressure difference to initiate the flow. This flow can be explained by Toricelli's Law, and by using Bernoulli's Principle.

This video details the relationship between Bernoulli's Principle and Toricelli's Law when siphoning is used to move a liquid from a higher elevation to a lower elevation.