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 (   • What is Water Hammer?  ). 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! Watch this video and the entire Practical Engineering catalog ad-free on Nebula: https://go.nebula.tv/practical-engine... -Patreon:   / practicalengineering   -Website: http://practical.engineering Marxist Arrow by Twin Musicom is licensed under a Creative Commons Attribution License Source:    • Marxist Arrow - Twin Musicom   Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License Source:    • Elexive - Tonic and Energy [Creative Commons]   This video was sponsored by Skillshare.