![]() The tree’s not important but I don’t want anyone to think I’m wasting this water. Here’s the setup: valve, clear pipe, pressure gage, more clear pipe, 50-foot garden hose, tree. So, I’m revisiting that demonstration with a few modifications so we can get the full picture. Spikes in pressure aren’t always bad, but they can be dangerous if a pipe bursts or expensive by requiring stronger pipes with higher pressure ratings.īut in that video, I didn’t talk about what happens on the other side of the valve. That’s because the fluid inside a pipe has a lot of momentum, and fluids aren’t compressible enough to absorb sudden changes in velocity. If you watched the water hammer video I made a few months back, you’ll know that slamming a valve shut on a flowing pipe can cause a huge spike in pressure. But a lot of people pointed out that very low pressure in pipes can be just as dangerous. In the last two videos, we’ve looked at phenomena that cause high-pressure spikes in pipes. ![]()
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