Dummies.com features a concise sewer cleanout diagram, as well as details on how the home's plumbing system works. Acme How To also contains detailed information on how sewer cleanout systems are designed.
The waste that travels through the plumbing system's pipes move through the drain waste vent system. Eventually, all pipes converge at a single main drain, which homeowners or maintenance people can access by opening the sewer cleanout valve. Although the cleanout valve is different for every home plumbing system, all such valves perform the same task, allowing homeowners to access their pipes quickly to remove obstructions if they occur.