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2. Rat Guard - Wikipedia

   en.wikipedia.org/wiki/Rat_Guard

   Rat guards are commonly made from steel, aluminum, or strong plastic materials to ensure durability and to prevent rats from chewing through them. The guards are installed a short distance away from where the cable connects to the ship, dock, or building to ensure rats cannot bypass the guard.

3. Reports of rats are on the rise in Tri-Cities. Here’s what ...

   www.aol.com/reports-rats-rise-tri-cities...

   Rats don’t like to be out in the open, so keeping clutter and brush away from houses is helpful, according to the health district. Miller recommends keeping shrubs and trees 3 to 6 feet away ...

4. 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.

5. Infiltration/Inflow - Wikipedia

   en.wikipedia.org/wiki/Infiltration/Inflow

   Groundwater entering sanitary sewers through defective pipe joints and broken pipes is called infiltration. [4] Pipes may leak because of careless installation; they may also be damaged after installation by differential ground movement, heavy vehicle traffic on roadways above the sewer, careless construction practices in nearby trenches, or degradation of the sewer pipe materials.

6. Storm drain - Wikipedia

   en.wikipedia.org/wiki/Storm_drain

   Storm drain grate on a street in Warsaw, Poland Storm drain with its pipe visible beneath it due to construction work. A storm drain, storm sewer (United Kingdom, U.S. and Canada), highway drain, [1] surface water drain/sewer (United Kingdom), or stormwater drain (Australia and New Zealand) is infrastructure designed to drain excess rain and ground water from impervious surfaces such as paved ...

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