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Home / Calculators / Gravity Line Calculation (Manning)

Gravity Line Calculation (Manning)

Find the filling ratio of channels and pipes. Filling ratio, velocity and recommended size.

Calculating…
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How do we calculate?

Manning formula: Q = (1/n) × A × R^(2/3) × S^(1/2). The water depth in a partly filled circular section is found iteratively. For wastewater lines the smallest size with a filling ratio not exceeding 70% is selected; the velocity should stay between 0.6 and 3 m/s.

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Send us the list from the calculator; we will quote flanges, elbows, tees, reducers, pipes and valves in a single offer, with EN 10204 3.1 material certificates.

This calculator is used in these sectors: Water treatment plants. All calculators →

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