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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. Double check valve - Wikipedia

   en.wikipedia.org/wiki/Double_check_valve

   A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

4. Reduced pressure zone device - Wikipedia

   en.wikipedia.org/wiki/Reduced_pressure_zone_device

   Backflow preventers are categorized into three groupings: Assembly, Device or Method. With the exception of elimination, these are the only ways one can control backflow from taking place. The eight named backflow assemblies all have two resilient seated isolation/shut off valves with properly located test ports.

5. 5 Family Members Found Dead Inside Utah Home, 17-Year ... - AOL

   www.aol.com/5-family-members-found-dead...

   Related: 3 Women Found Dead Inside Ohio Home in 'Alarming and Troubling' Scene: ‘Very Complex' Authorities said their investigation began when they were contacted by a family member on Monday ...

6. 9 Pizza Chains That Make Their Dough Fresh In-House - AOL

   www.aol.com/9-pizza-chains-dough-fresh-170000604...

   However, Domino’s, the world’s largest pizza chain with over 6,692 locations in the U.S., runs one of the country's most efficient pizza dough supply chains, with 18 supply centers producing ...

7. Woman Attempting to Smuggle 22 Pounds of Meth Wrapped as ...

   www.aol.com/lifestyle/woman-attempting-smuggle...

   A Canadian woman allegedly attempted to smuggle 22 pounds of methamphetamine wrapped as Christmas presents through a New Zealand airport on Sunday, Dec. 8. According to a news release from the New ...