What are the pressure requirements for a typical wet pipe sprinkler system?

A typical wet pipe sprinkler system generally requires a static pressure of 15 to 20 psi at the sprinkler heads. This pressure range ensures that the system is adequately charged and can deliver water effectively when activated. Maintaining this pressure is crucial for the proper function of the sprinklers, as it allows them to discharge water evenly and at sufficient volume to suppress fires.

If the pressure is too low, it may not provide enough force to generate an effective spray pattern, leading to potential gaps in coverage. Conversely, if the pressure is too high, it could cause excessive water flow that can damage the system or create a risk for flooding. Therefore, adhering to the 15 to 20 psi requirement strikes a balance, enabling optimal performance of the wet pipe system.