Minimum pressure required for sprinkler function?

Minimum pressure required for sprinkler function?

• A. Revision Cycles
• B. Sprinkler Ordinances
• C. Operating Pressure
• D. American National Standard

Answer: (C)

Operating pressure is the pressure the sprinkler system must maintain at the heads during flow to ensure the sprinkler will actually discharge water and operate correctly. This is the minimum pressure needed to overcome friction losses in the piping and the sprinkler’s own flow characteristics so that water is released when a head is activated. Static pressure is the pressure when nothing is moving, and residual pressure is the pressure measured while water is flowing. Those relate to different conditions, not the minimum pressure required for the sprinkler to function. The other options point to maintenance cycles, local rules, or the standards body, not to the pressure needed for operation.

Operating pressure is the pressure the sprinkler system must maintain at the heads during flow to ensure the sprinkler will actually discharge water and operate correctly. This is the minimum pressure needed to overcome friction losses in the piping and the sprinkler’s own flow characteristics so that water is released when a head is activated.

Static pressure is the pressure when nothing is moving, and residual pressure is the pressure measured while water is flowing. Those relate to different conditions, not the minimum pressure required for the sprinkler to function. The other options point to maintenance cycles, local rules, or the standards body, not to the pressure needed for operation.