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The water pressure at the bottom of a 55-gallon drum positioned 20 feet above can be estimated using the formula for hydrostatic pressure, which is approximately 0.43 psi for every foot of height. Therefore, at 20 feet, the pressure would be around 8.6 psi (20 feet x 0.43 psi/foot). Additionally, the vertical downpipe itself, if properly sized, should not significantly affect this pressure. However, actual pressure can vary based on factors like pipe diameter and friction losses.

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8mo ago

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