Invert Levels in Pipes and Drainage Systems
According to Wikipedia, an invert level is the elevation of the inside bottom of a pipe, culvert, or drainage structure. Engineers use it to guide how stormwater and wastewater flow through underground systems by gravity. In developing areas, invert levels are important in storm sewer and utility design because correct elevations help maintain gravity flow, […]
Roof Downspout
According to Wikipedia, a downspout, waterspout, downpipe, drain spout, or roof drainpipe is a pipe for carrying rainwater from a rain gutter.