How to Collapse a Pipe by Closing a Valve

Water hammer can work in both directions, and I only discussed one of those in the previous video (https://www.youtube.com/watch?v=xoLmVFAFjn4). Today's episode revisits that demonstration to show how water hammer can form a vacuum pressure in a pipe. Momentum carrying fluid away from a valve wants to keep going even after the valve is closed. This generates a negative pressure than can cause major damage!

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Marxist Arrow by Twin Musicom is licensed under a Creative Commons Attribution License
Source: https://www.youtube.com/watch?v=rBlLC8TUXP0

Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License
Source: https://www.youtube.com/watch?v=U6fBPdu8w9U

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