Understanding Water Pressure: Tips for Measuring Flow from a 250 Gallon Tank

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To determine the water pressure from a 250-gallon tank through a 3/8-inch nozzle, the key factor is the height of the water column above the nozzle. The pressure at the nozzle can be calculated using the formula p = ρgh, where ρ is the water density, g is the acceleration due to gravity, and h is the height of the water. At normal conditions, approximately 1 atm (14.7 psi) of pressure is generated for every 33 feet of height. While the nozzle size does not affect the pressure, it influences the water's exit speed. Understanding these principles allows for accurate measurement of water flow from the tank.
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If there is anyone out there that can answer this it would be greatly appreciated. I am stuck with this one.

At normal pressure of its own weight how can I determin the water pressure of water coming out of a 3/8ths in. nozzle out of a 250 gallon tank?
 
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i think that it would depend on how tall the tank is. but i am not sure of the equasioons to figure it out. i am no expert and am probably missing something.
 
Nozzle size doesn't matter. Initially you get about 1 atm (14.7psi) of pressure for every 33 feet of height, which holds until the pressure starts to significantly compress the water, but this would require a very tall tank.
 
Nozzle diameter doesn't affect the pressure, but it does affect the exit speed of the water. The pressure is only a function of the water level height above the nozzle (p=ro*g*h).
 

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