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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.
It is usually constructed of brass and resembles a 90-degree elbow with a hood on its top to allow air to enter the water system if a siphon attempts to form. Inside this elbow is a poppet valve that is held "up" by the water pressure found in the system, closing the air entrance to the device. If the pressure in the "upstream side" is reduced ...
NBCC's flagship certification is the National Certified Counselor (NCC). The NCC is a generic certification for professional counselors and does not designate a particular specialty area. Holding an NCC indicates that a counselor is nationally board certified. [7] There are currently over 63,000 NCCs in the U.S. and many other countries.
The Dow Jones Industrial Average jumped 498 points, or 1.2%, and the Nasdaq composite gained 1%. Superstar stock Nvidia and other Big Tech companies led the market, which got a lift after a report ...
"It was just circling, and circling. You could see it wasn't completely frozen over, so I panicked," Felicani said. "Then I heard the crackling and was like, 'he's going in.'"
Cases of norovirus — the virulent, wildly contagious virus that causes vomiting and diarrhea — are increasing in the U.S., the Centers for Disease Control says, reporting double the amount of ...
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