A "sewage line" refers to the underground pipes or tubes that carry wastewater and sewage away from buildings and residential areas to treatment plants where it is cleaned. Full definition
With a few easy connections, it ties in directly to your existing sewage lines. (okcpetsmagazine.com)
Installation involved removing concrete or flooring around your current sewage line and cutting and replacing sections of pipes. (armourinsurance.ca)
Since gaining independence in 1981, Belize has made tremendous strides in improving infrastructure, including sewage lines, flush toilets, and water treatment plants. (chabilmarvillas.com)