The complex is not connected to main sewers and as such has its own sewage system.

There must be a main sewer ahead of us.

As for sanitation, earth closets were still in use until the main sewer was installed.

It might help if you took a few walks with it and tried to locate where the main sewers are.

If they are all full, the blockage is between the last inspection chamber and the main sewer.

They entered a much wider and higher main sewer than any he had seen before.

He pointed to the main sewer just beyond the guard station.

You will lead me to the city level by the shortest way, avoiding the main sewers.

From what he could tell, the main sewers had been built farther from the avenue north of the market square.

The main sewers are maybe six feet in diameter.