Hydraulics and sanitation
Sewer slope between two manholes
Formulas
I = (Z_amont − Z_aval) / L
V_ps = (1/n) (D/4)^(2/3) I^(1/2) ; Q_ps = V_ps × π D² / 4
Sewer slope between two manholes
Fill in the inputs and run the calculation: results and every intermediate step will appear here.
These tools provide estimates and calculation aids. They are neither design calculations nor an engineering approval: any design or safety decision must be checked by a qualified professional against the applicable standards.