A forced sewer is waste that cannot drain by gravity and must be pumped to a place of disposal
Storm - sanitary - combination - forced - gravity
Not exactly a sewer main normally flows by graviety and a forced main is a pumped system
Hopefully by gravity BUT there are pumped / forced sewerage systems
By gravity / forced main which rely on pumps AKA sewerage ejectors
A sewer system is the sewer or the sysyem of the sewer.
Sewer Cleaning Sewer Line Repair Trenchless Sewer Repair Sewer Drain Cleaning Sewer and Drain Cleaning
"A sewer contractor works in the sewer system.
A sewer's protector is a thimble. Sewer as in sewing not sewerage!
The sewer is in the bathroom in the park.
Sewer is in and connected
You can't there is no sewer
Sewer Line The Woodlands