Discussion Overview
The discussion revolves around the pressure experienced by the bottom drain fittings of an above ground swimming pool, specifically considering the effects of water depth and external soil conditions. Participants explore the implications of pressure on the fittings due to the weight of the water and the surrounding ground conditions.
Discussion Character
- Technical explanation
- Debate/contested
Main Points Raised
- One participant inquires about whether the pressure at the bottom drain fittings is ambient or greater due to the weight of the water.
- Another participant states that pressure increases with depth, providing a calculation that suggests a pressure of 16.4 psi at the bottom of the pool.
- A different viewpoint suggests that if the fittings are immersed in water, the pressure acts in all directions, resulting in a net force of zero on the fittings.
- Concerns are raised about the force on the connection of a 1.5-inch diameter hose to the drain, emphasizing the pressure from the water at the bottom of the pool.
- One participant argues that the external pressure on the fittings is dependent on ground conditions, noting that if the fitting is back-filled, it complicates the pressure assessment due to soil mechanics.
- It is suggested that assuming ambient pressure outside the pipe is acceptable, provided the depth does not exceed about a foot.
Areas of Agreement / Disagreement
Participants express differing views on the nature of the pressure acting on the fittings, with some asserting that the pressure is influenced by water depth while others emphasize the role of external ground conditions. The discussion remains unresolved regarding the exact pressures experienced by the fittings.
Contextual Notes
Limitations include the assumptions made about the external pressure and the conditions of the ground, which are not fully defined. The discussion also highlights the complexity of soil mechanics in relation to the pressure on the fittings.