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What is the velocity of water in most city water pipes?

What is the velocity of water in most city water pipes?

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The minimum municipal water distribution system pipes diameter in United States is 8". For a nominal diameter of 8 inches , the Water Delivery Velocity may lie between 4-6 ft/s. Although there could be some pipes with 4" dia having water flow velocity 3-4 ft/s. Overall in most cities , a fixed pressure is maintained in the pipes which may range from 50 psi to 120psi, and the velocities at different cross sections varies with the area of cross section and the distance from the pump.

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