Waste drain systems have extensions {cleanout} from lowest drain to above-house trap, with covers.
Tanks {septic tank} can receive house wastewater and have anaerobic bacteria. They do not connect to public sewer systems.
Waste drain systems can have main pipes {soil stack} that lead from lowest drain to roof.
Waste drain systems can have branch pipes {vent stack} that lead from toilet to roof.
2-Art-Architecture-Building Parts
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Date Modified: 2022.0225