Transport waste and storm water if it is a combo system
grow roots
Sewer system is where waste goes from your plumbing. ADD: Sewers are the pipe system that runs underneath the surface of the ground usually along the side of roads or under sidewalks. The rain runs...
Through the man hole opening
A sewer is a pipe under the ground for carrying away water and waste.
Should be low enough to maintain proper pitch and below the frost line if applicable