Drain Gradient & Invert LevelsEnter the pipe, the run length, the gradient and the ground levels. Get the fall, the invert level at every manhole, the cover and whether the flow cleans itself, on a live long section.

SheetT-32
MethodManning, full + part flow
Unitsm, mm
By@smart_tools_every_week
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Invert depth = ground level minus the bottom inside of the pipe at the start. Cover = ground to the top of the pipe. Flow is the peak you expect in the pipe (a bathroom group is often about 0.5 to 1.5 L/s).

Fall–
End invert–
Velocity–
Flow depth–

Long section

Pipe section

Checks

    Invert levels RL, m

    PointChainageGroundInvertCover