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2. Drain-waste-vent system - Wikipedia

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

   Generally, a toilet outlet has the shortest trap seal, making it most vulnerable to being emptied by induced siphonage. An additional risk of pressurizing a system ahead of a waste stream is the potential for it to overwhelm a downstream trap and force tainted water into its fixture. Serious hygiene and health consequences can result.

3. Trap (plumbing) - Wikipedia

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

   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 materials to pass through. In oil refineries, traps are used to prevent hydrocarbons and other dangerous gases and chemical fumes from escaping through drains.

4. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   A trap primer automatically injects water into a trap, maintaining a water seal to keep sewer gas out of buildings. It must be installed in an easily accessible place for adjustment, replacement, and repair. A trap primer, a specialized valve, is usually connected to a clean-water supply in addition to a DWV system. [20]

5. Dual flush toilet - Wikipedia

   en.wikipedia.org/wiki/Dual_flush_toilet

   The toilet has two buttons on the cistern rather than the single-flush one; one button delivers a lesser amount of water (eg. 3 litres) and the other a greater amount (eg. 6 litres). [7] It also uses a larger 10 cm trapway in the bowl, allowing for water to come out faster and clear the bowl efficiently. [7] Lever

6. Flush toilet - Wikipedia

   en.wikipedia.org/wiki/Flush_toilet

   A flush toilet (also known as a flushing toilet, water closet (WC); see also toilet names) is a toilet that disposes of human waste (i.e., urine and feces) by collecting it in a bowl and then using the force of water to channel it ("flush" it) through a drainpipe to another location for treatment, either nearby or at a communal facility.

7. P-trap - Wikipedia

   en.wikipedia.org/?title=P-trap&redirect=no

   This page was last edited on 8 July 2010, at 17:55 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. 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 ...