system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does siphoning work?
gpt
Siphons are a way to make water "climb" through a pipe then descend to a lower point compared to its starting point.

Imagine a heavy rope hanging on a tree branch, with one end hanging lower than the other. The shortest end will go up because gravity affects the whole rope and the longest end weights more.

Water in a pipe acts a bit like such a rope, allowing the pipe to suck the water from a recipient as long as your pipe is full of water and descends lower than the recipient.