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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.
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.
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.
Backflow is a term in plumbing for an unwanted flow of water in the reverse direction. [1] It can be a serious health risk for the contamination of potable water supplies with foul water . In the most obvious case, a toilet flush cistern and its water supply must be isolated from the toilet bowl.
Wilkins and Wontkins are characters created by puppeteer Jim Henson for the Wilkins Coffee brand. The coffee was produced and sold in the United States by John H Wilkins & Company in Washington D.C. [ 1 ] [ 2 ] "Wilkins", a character who enjoys Wilkins Coffee, [ 3 ] and "Wontkins", a character who does not, are used to advertise the coffee.
Dominique Wilkins is a former professional basketball player who, from 1982 to 1994, [1] played for the Atlanta Hawks of the National Basketball Association (NBA). [2] By the time his playing career had ended, Wilkins was a nine-time NBA All-Star and had won the 1985 and 1990 Slam Dunk Contests, earning him the nickname "The Human Highlight Film". [1]
As Wilkins entered his thirties and the Hawks needed more of an all-around contribution from their star, Wilkins averaged 9.0 rebounds and 3.0 assists during the 1990–91 season. A nine-time NBA All-Star and the winner of two NBA slam dunk contests , Wilkins registered 26,668 points and 7,169 rebounds in his NBA career.
Borges begins by noting John Wilkins's absence from the 14th edition of the Encyclopædia Britannica and makes the case for Wilkins's significance, highlighting in particular the universal language scheme detailed in his An Essay towards a Real Character and a Philosophical Language (1668). Wilkins's system decomposes the entire universe of ...
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