Bernoulli Total Head (Pressure + Velocity + Elevation)
Total head H = P/gamma + V^2/(2g) + z (ft of fluid), the mechanical energy per unit weight, conserved along a streamline with no loss. Water at 30 psi, 6 ft/s, 10 ft -> 69.23 + 0.56 + 10 = 79.79 ft; where velocity drops the head converts to pressure (Venturi). The engineer of record governs.
Formula and source
h_press = P x 144 / gamma; h_vel = V^2/(2 g); H = h_press + h_vel + z; conserved: H1 = H2 + h_loss.
The Bernoulli energy equation (total head) from first-principles fluid mechanics, by name.
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