Backwater Valve Calculator
Size a backwater valve by checking pipe capacity against design flow using Manning's equation.
How to Use the Backwater Valve Calculator
- Enter the pipe diameter in mm.
- Enter the design flow rate in L/s.
- Enter the pipe slope as a percentage.
- Verify that pipe capacity exceeds design flow.
使用场景
- •Sewer backflow prevention
- •Basement flood protection
- •Municipal drainage design
公式
Q = (A/n) × R^(2/3) × S^(1/2)
常见问题
How accurate is this calculator?
Results are based on standard engineering formulas and are suitable for preliminary estimates.
What units are used?
SI units (metres, kg, kPa) are used unless otherwise noted.
Is it free?
Yes, all calculators are completely free.