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2. Backflow prevention device - Wikipedia

   en.wikipedia.org/wiki/Backflow_prevention_device

   Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.

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. Spark arrestor - Wikipedia

   en.wikipedia.org/wiki/Spark_arrestor

   Centrifugal type spark arrester. A spark arrester (sometimes spark arrestor) is any device which prevents the emission of flammable debris from combustion sources, such as internal combustion engines, fireplaces, and wood-burning stoves. Spark arresters play a critical role in the prevention of wildland fire and ignition of explosive ...

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6. News, Politics, Sports, Mail & Latest Headlines - AOL.com

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7. Texas Grandmother Accused of Munchausen by Proxy Abuse of ...

   www.aol.com/texas-grandmother-accused-munchausen...

   A Texas grandmother is accused of having an unnecessary gastric feeding tube placed into her granddaughter. Lisa Campbell-Goins is charged with unlawful restraint, exploitation of a child and ...

8. Flashback arrestor - Wikipedia

   en.wikipedia.org/wiki/Flashback_arrestor

   Flashback arrestors with different size and flow rate, and different connections. A flashback arrestor or flash arrestor is a gas safety device most commonly used in oxy-fuel welding and cutting to stop the flame or reverse flow of gas back up into the equipment or supply line. It protects the user and equipment from damage or explosions.

9. Man allegedly called 911 a total of 17 times and demanded a ...

   www.aol.com/man-allegedly-called-911-total...

   This guy gave new meaning to the slogan “Gottahava Wawa.” Police in East Windsor, N.J., arrested a 24-year-old man on Dec. 23, and charged him with misusing the town’s 911 system for ...