Sprinkler Contractors Practice Exam 2026 - Free Practice Questions and Study Guide for Sprinkler Certification

To convert feet of head to psi, you multiply by the conversion factor of approximately 0.4333 psi per foot. This is derived from the relationship between pressure, height of a liquid column, and gravity. Specifically, 1 psi is equivalent to a column of water that is approximately 2.31 feet high at standard atmospheric conditions. Therefore, when converting feet of head to psi, the conversion factor helps us understand that for every foot of water column, there is a pressure increase of about 0.4333 psi.

Using this conversion is essential in various applications, including hydraulic calculations in sprinkler systems, where understanding the pressure exerted by the height of water in pipes or tanks is crucial for system design and functionality. Knowing this allows contractors to ensure that they have the correct pressure to deliver water effectively throughout the irrigation system.