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2. Plumber's snake - Wikipedia

   en.wikipedia.org/wiki/Plumber's_snake

   A plumber's snake or drain snake or drain auger is a slender, flexible auger used to dislodge clogs in plumbing. The plumber's snake is often reserved for difficult clogs that cannot be loosened with a plunger. It is also sometimes called a toilet jack. A plumbers snake is often used by plumbers to clear a clogged drain pipe or sanitary sewer.

3. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

4. Drain cleaner - Wikipedia

   en.wikipedia.org/wiki/Drain_cleaner

   Most municipal building codes mandate that drain plumbing increase in diameter as it moves closer to the municipal sewer system. i.e., most kitchen sinks evacuate water with a 1 + 1 ⁄ 2-inch drain pipe, which feeds into a larger 4-inch drain pipe on the main plumbing stack before heading to a septic tank or to the city sewage system. This ...

5. Sanitary manhole - Wikipedia

   en.wikipedia.org/wiki/Sanitary_manhole

   To solve a blockage, a sand trap is placed in the channel at the outlet of the downstream manhole in order to catch any debris while allowing water to go over it to the outlet pipe. Then a jet flushing or power rodding is used to clan from the outlet pipe of the upstream manhole in an attempt to dislodge the blockage which will be caught at the ...

6. Manhole - Wikipedia

   en.wikipedia.org/wiki/Manhole

   In these manholes, the entire underground enclosure is constructed of some composite material, in addition to the cover. Structures that can be integrated into composite manholes include: Flow inverts [8] Flumes [9] Drop structures from higher elevation flows to lower elevation discharge pipes; Weirs [10] Storm water screening structures [11]

7. Trap (plumbing) - Wikipedia

   en.wikipedia.org/wiki/Trap_(plumbing)

   Water seal in drain pipe under a sink. Water enters at right, fills the trap, and continues left. Inverted siphoning occurs below the line "A". Examples of traps. In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste ...