What is the change in elevation between the upstream invert and the downstream invert of a 400-foot (ft) section of 8-inch diameter sewer pipe set at a 4.5% slope?

Question

Quizplus · Accepted Answer

The change in elevation of a 400 ft section of 8-inch diameter sewer pipe set at a 4.5 % slope is 18 ft.
Solution: Elevation change = Length of pipe x slope
Given, 4.5 % slope = 4.5 ft / 100 ft
Elevation Change = 400 ft x 4.5 ft / 100 ft
= 18 ft

What Is the Change in Elevation Between the Upstream Invert