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Detailed Hydrostatic Pressure Demonstration

0:10
2:11
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Learn about hydrostatic pressure, forms and your basement. #learn #concrete #basement #formwork

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What happens here

The presenter re-emphasizes the concept of hydrostatic pressure by demonstrating that pressure is low at the top of a water column and high at the bottom. He drills additional holes in the large PVC pipe at various heights. The water streams from the lowest hole shoot out with the most force and travel the furthest, visually confirming the direct relationship between depth and pressure.

Goal: Provide further visual evidence of hydrostatic pressure increasing with depth.

Tools and materials

  • Cordless drill DeWalt — Drilling holes for demonstration
  • Large PVC pipe — Simulating a water column to demonstrate pressure
  • Small PVC pipe — Used for comparison, although not actively drilled in this segment
  • Water N/A — Filling the PVC pipes

What they say

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This is your standard foundation. This gets poured in two sections. You have a footing and a stem wall. Because of hydrostatic pressure, there are some steps that have to be taken. Hydrostatic pressure will be low up here and high down here. The lowest one has the most pressure and as the water column comes down, it still stays that way. Because this pressure increases at the bottom, these braces hold the top from horizontal movement and through your forms you'll have snap

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