A pressure of 75 psi is equivalent to how many feet of head pressure?

To convert pressure in psi (pounds per square inch) to head in feet, the formula used is:

[ \text{Head (feet)} = \frac{\text{Pressure (psi)} \times 2.31}{\text{Specific Weight of Water (lb/ft}^3\text{)}} ]

In most calculations, the specific weight of water is generally approximated as 62.4 lb/ft³. Therefore, the calculation becomes:

[ \text{Head (feet)} = 75 , \text{psi} \times 2.31 = 173.25 , \text{feet} ]

Thus, a pressure of 75 psi corresponds to approximately 173.2 feet of head pressure, making this choice correct.

This calculation is significant in fields where water distribution is essential, allowing engineers and technicians to understand the height to which a certain pressure can elevate water. It is commonly used in various applications, including irrigation and plumbing systems, to ensure adequate pressure is maintained.