Building DN 530 Flow Test.pdf

This is a fire hydrant flow test report documenting field measurements and hydraulic analysis conducted on June 11, 2026, at Building 530 PoolS, with Bryan Payne as the point of contact. The test evaluated both a static hydrant and a flow hydrant located on the facility's water distribution system, as illustrated in the site map showing the hydrants' positions relative to buildings 524 and 530.

Field measurements recorded a static pressure of 58 psi at the static hydrant with a discharge coefficient of 0.9, a residual pressure of 46 psi, and a pitot flow reading of 750 gpm from the flow hydrant. The calculated flow at 20 psi (Q₂₀) was determined to be 1,398 gpm using the formula Q₂₀ = Q_act × [(Ps - 20)/(Ps - PR)]^0.54. A pressure-flow graph displays the relationship across three data points: 58 psi at 0 gpm, 46 psi at 750 gpm, and 20 psi at 1,398 gpm. These results characterize the hydrant system's capacity and pressure characteristics for the facility's fire protection infrastructure.