Copper Pipe - Water Velocity Limits

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The water velocity in copper pipes should be kept within certain limits to avoid erosion, corrosion and excessive noise generation.

• in cold water systems the velocities should not exceed 8 feet per second (2.4 m/s)
• in hot water systems with temperatures below 140 ^oF (60 ^oC) the velocities should not exceed 5 feet per second (1.5 m/s)
• in hot water systems with temperatures above 140 ^oF (60 ^oC) the velocities should not exceed 2 feet per second (0.6 m/s)

Be aware, and take care of, that local velocities in small pipes, bends and similar obstructions can exceed the values above.

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