Which installation tag data item identifies which water flow test was used in the hydraulic design?

• A. Test date
• B. Test technician name
• C. Static and residual pressure with the measured gallons per minute flowing of the water supply flow test used to hydraulically design the system
• D. Flow rate only

Answer: (C)

When documenting hydraulic design, you must capture the exact water flow test results that were used. The essential data item includes the static pressure, the residual pressure, and the measured flow rate (gallons per minute) from the water supply flow test. This combination shows the pressures present at a given flow, which is exactly what the hydraulics calculations rely on to size piping, sprinklers, and overall system performance. Without all three pieces—static pressure, residual pressure, and the actual flow rate—you can’t recreate the conditions that the design was based on.

Other options don’t provide the full picture. A test date only tells you when the test happened, not what the test measured or used for design. The technician’s name identifies who performed the test but not the test results or conditions. Flow rate alone describes how much water moved but omits the pressure readings that are critical for hydraulic calculations.