What should you monitor when performing a long relay lay?

• A. Color of water in delivery lines
• B. Pressure balance across all pumps, friction losses, and ensuring consistent water flow to the target
• C. Number of hydrants used
• D. Speed of pump operators

Answer: (B)

In a long relay lay, the crucial focus is on keeping the hydraulic setup balanced so water reaches the target with the right pressure. Monitor the pressure balance across all pumps, account for friction losses along the hose lines and fittings, and ensure the water flow to the target remains steady. This matters because each pump adds pressure, while friction losses between segments eat into that pressure; if you don’t track these, the stream at the nozzle can fall short or become unstable. Use gauges on the pump discharges and intakes, adjust discharge pressures to compensate for losses, and watch for a consistent flow to the target. The color of the water, the number of hydrants used, or how quickly the operators move don’t directly ensure the required hydraulic performance.