Which formula is used to calculate water pressure in a distribution system?

The correct formula for calculating water pressure in a distribution system is P = 0.433 x H. This equation illustrates that pressure (P), measured in pounds per square inch (psi), is directly proportional to the height (H) of the water column, measured in feet. The constant 0.433 is derived from converting the weight of a column of water into pressure units, acknowledging that a 1-foot column of water exerts approximately 0.433 psi of pressure at the base. This relationship is foundational in hydraulic engineering and helps engineers assess how much pressure will be exerted at any given height in a water distribution system. Understanding this formula is essential for designing, analyzing, and troubleshooting water distribution systems effectively.