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2. Grease trap - Wikipedia

   en.wikipedia.org/wiki/Grease_trap

   Where FOG is a concern in the local wastewater system, communities have established inspection programs to ensure that these grease traps and/or interceptors are being routinely maintained. [ 10 ] It is estimated 50% of all sewer overflows are caused by grease blockages, with over 10 billion US gallons (38,000,000 m 3 ) of raw sewage spills ...

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. ‘Rigging the system.’ Is Tacoma’s grease-trap policy killing ...

   www.aol.com/rigging-system-tacoma-grease-trap...

   “The city is responsible for making sure the sewer system works properly, and it does not want to risk problems caused by failing interceptors,” she said. ... Neither are grease traps a catch ...

5. Interceptor - Wikipedia

   en.wikipedia.org/wiki/Interceptor

   Interceptor drain, a type of French drain often used in storm sewer systems; Interceptor sewer, a large pipe in urban sanitary sewers; Grease interceptor or grease trap; Petrol interceptor, a trap to separate hydrocarbons from rainwater runoff

6. Fatberg - Wikipedia

   en.wikipedia.org/wiki/Fatberg

   A fatberg is a rock-like mass of waste matter in a sewer system formed by the combination of flushed non-biodegradable solids (such as wet wipes) with fat, oil, and grease (FOG) deposits. [1] [2] [3] The handling of FOG waste and the buildup of its deposits are a long-standing problem in waste management, with "fatberg" a more recent neologism. [4]

7. Sanitary sewer - Wikipedia

   en.wikipedia.org/wiki/Sanitary_sewer

   An advantage of sanitary sewer systems is that they avoid combined sewer overflows. Sanitary sewers are typically much smaller in diameter than combined sewers which also transport urban runoff . Backups of raw sewage can occur if excessive stormwater inflow or groundwater infiltration occurs due to leaking joints, defective pipes etc. in aging ...