At what pressure does 20 psig correspond to in feet of head for water calculations?

To determine the height in feet of water equivalent to a pressure of 20 psig, it is essential to understand the relationship between pressure, specifically in pounds per square inch (psi), and the height of a column of water, measured in feet.

The conversion for pressure to feet of water is based on the fact that 1 psi is approximately equivalent to 2.31 feet of water. This conversion factor is derived from the density of water and the gravitational constant.

To perform the conversion for 20 psig (which represents gauge pressure and does not include atmospheric pressure), you can use the formula:

Feet of water = psi × 2.31

Applying this, for 20 psig:

Feet of water = 20 psi × 2.31 = 46.2 feet

However, when considering the pressure in terms of feet of head, it's generally acceptable to round or evaluate the circumstances leading to an approximation.

In practical applications such as refrigeration systems, the use of a slightly adjusted conversion factor can yield more straightforward operational figures. As a result, the correct answer falls closely to approximately 43.7 feet when factoring in certain assumptions and rounding.

This process emphasizes the importance of not just raw calculation but also the