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2. Grease trap - Wikipedia

   en.wikipedia.org/wiki/Grease_trap

   In the US, sewers back up annually an estimated 400,000 times, and municipal sewer overflows on 40,000 occasions. [5] [full citation needed] [6] The U.S. Environmental Protection Agency has determined that sewer pipe blockages are the leading cause of sewer overflows, and grease is the primary cause of sewer blockages in the United States. [7]

3. Fatberg - Wikipedia

   en.wikipedia.org/wiki/Fatberg

   Blocked fat reacts with the lining of the pipe and undergoes saponification, converting the oil into a solid, soap-like substance. [7] Grease and fat blockages can cause sanitary sewer overflows, in which sewage is discharged into the environment without treatment. [10] Fatbergs have been considered as a source of fuel, [12] specifically biogas ...

4. Sanitary sewer overflow - Wikipedia

   en.wikipedia.org/wiki/Sanitary_sewer_overflow

   Causes of sanitary sewer overflows include: Blockage of sewer lines, infiltration/Inflow of excessive stormwater into sewer lines during heavy rainfall, malfunction of pumping station lifts or electrical power failure, broken sewer lines. Prevention of such overflow events involves regular maintenance and timely upgrades of infrastructure.

5. Busy road to close during three-week sewer repair - AOL

   www.aol.com/news/busy-road-close-during-three...

   Severn Trent Water says it has to install a new section of pipe after concrete blocked the system. ... in the area to explain that a "third party concrete blockage" meant the sewer was no longer ...

6. Pierce County’s upcoming sewer repair project to cost up to ...

   www.aol.com/news/pierce-county-upcoming-sewer...

   (The Center Square) – Pierce County will soon begin construction on urgent repairs to a sewer pipe in Lakewood after a recent inspection of wastewater infrastructure. Repairs will begin in early ...

7. Sanitary sewer - Wikipedia

   en.wikipedia.org/wiki/Sanitary_sewer

   Vertical pipes, usually made of precast concrete, called manholes, connect the mains to the surface. Depending upon site application and use, these vertical pipes can be cylindrical, eccentric, or concentric. The manholes are used for access to the sewer pipes for inspection and maintenance, and as a means to vent sewer gases.