backflow


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Related to backflow: backflow valve

backflow

[′bak‚flō]
(civil engineering)
The flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable supply of water from any other than its intended source.
(fluid mechanics)
Any flow in a direction opposite to the natural or intended direction of flow.

backflow

1. The flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable supply of water from any other than its intended source. Also see back siphonage
2. Any flow in a direction opposite to the natural or intended direction of flow.
References in periodicals archive ?
Zurn offers a range of backflow prevention devices and assemblies including atmospheric vacuum breakers, dual check valves, pressure vacuum breakers, double check valve assemblies, and reduced pressure principle backflow assemblies.
Dr Gandalf Lechner, Researcher in Cardiff's University's School of Mathematics, said: "Forces can of course make a particle go backwards - that is, they can reflect it, and this naturally leads to increased backflow. But we could show that even in a completely reflection-free medium, backflow occurs.
Research has shown that backflow occurs in about one in five patients who close their lips around the SE tip.
McGlinn's Public House, 111 Orondo Ave., Wenatchee; plumbing permit for backflow. Permit issued Jan.
However, what roles do berry transpiration and xylem backflow play during berry development?
The best way to determine whether backflow prevention devices are required in your building is to hire a Licensed Master Plumber (LMP), Professional Engineer (PE) or Registered Architect (RA) or to request a property inspection from the DEP.
For Phoenix area businesses, the problem is two-fold: not only is the stolen backflow preventer expensive to replace, but the business owner who finds out about the theft on a Monday, now has to deal with a flooded mess that more than likely has been gushing since the previous Friday.
After having the sewer line snaked, jetted and scoped, we learned that the backflow valve cap had broken off and become lodged in the line.
ALL taps with a hosepipe attached must be fitted with a backflow preventer or anti-syphon device, which prevents the water being contaminated fby harmful substances used in and around the garden.
Proton pump inhibitors, which work to stop the backflow of stomach acid, are being overprescribed, they said.
Special mixing elements create backflow with very gentle mixing, which yields energy savings of up to 30%, Reimelt says.
The pump operates in a defined sequence; it is self-priming and transports liquids without backflow. Because of the absence of check valves the flow can be reversed for fast pipe draining after CIP.