Backflow is a term in plumbing for an unwanted flow of water in the reverse direction. It can be a serious health risk for the contamination of potable...

A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow. In water distribution systems,...

The term Eurasian backflow, or Eurasian back-migrations, has been used to describe several pre-Neolithic and Neolithic migration events of humans from...

A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs...

toilets, while avoiding overflow and (in the event of low water pressure) backflow. The modern ballcock was invented by José Antonio de Alzate y Ramírez,...

hose spigots, hose bibs, and wall hydrants to have a vacuum breaker or backflow preventer, so that water cannot return through the spigot from the hose...

atrium to the right ventricle during diastole, and to close to prevent backflow (regurgitation) from the right ventricle into the right atrium during right...

the heart or between heart chambers. It is the circulatory equivalent of backflow in engineered systems. It is sometimes called reflux. The various types...

regardless of flow direction or pressure. In addition to closing in response to backflow or insufficient forward pressure (normal check-valve behavior), it can...

minimum is an air gap. See cross connection control & backflow prevention for an overview of backflow prevention methods and devices currently in use, both...

blood is maintained by one-way (unidirectional) venous valves to prevent backflow. In the lower limbs this is also aided by muscle pumps, also known as venous...

Sometimes called a check valve or a backflow preventer, a chemigation valve is an apparatus designed to protect water supplies from agricultural chemicals...

to allow blood flow and which then close together to seal and prevent backflow. The mitral valve has two cusps, whereas the others have three. There are...

may also occur with valvular insufficiency (regurgitation), which allows backflow of blood when the incompetent valve closes with only partial effectiveness...

commonly used in medical applications to prevent contamination due to backflow. One end of the valve is stretched over the outlet of a supply line, conforming...

A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. It is different...

practice, is an arrangement of pipes formed into a vertical loop to prevent backflow of water within the plumbing potable water system. Since a siphon has a...

a clapper valve (if not designed into the hydrant already) to prevent backflow into the hydrant. Additionally, residents who wish to use the hydrant to...

non-potable fluid, the water supply shall be protected against backflow by a backflow preventer. Where a hose bibb is installed outside a building, inside...

form of backflow prevention. A common use of the term "air gap" in domestic plumbing refers to a specialized fixture that provides backflow prevention...

many causes. GERD is the most common cause of esophagitis because of the backflow of acid from the stomach, which can irritate the lining of the esophagus...

incompetent and allows backflow from the pulmonary artery to the right ventricle of the heart during diastole. While a small amount of backflow may occur ordinarily...

the valve function, thereby opening up the ureter to backflow. The main risk of such a backflow is the spreading of a urinary tract infection up into...

Anorectal varices are collateral submucosal blood vessels dilated by backflow in the veins of the rectum. Typically this occurs due to portal hypertension...

fail; the second is that testicular valves that are supposed to prevent backflow fail (venous insufficiency) leading to swelling and compression of the...

Reverse Promotional poster Also known as Backflow Flow Back Hangul 역류 RR Yeongnyu MR Yŏngnyu Genre Family Melodrama Revenge Created by Choi Yong-won Written...

isolation is obtained. Float Shoes and Collars (float valves) prevent backflow after the cement has been pumped into place. Devices fitted with hinged...

blood flows one way through the heart due to heart valves, which prevent backflow. The heart is enclosed in a protective sac, the pericardium, which also...

Backwater valve, a device used to protect potable water supplies from backflow Blackwater (disambiguation) All pages with titles beginning with Backwater...

Lean TAPS combustor reduces NOx gases with required pressure loss and backflow margin. Fan blades have steel alloy leading edges and the composite fan...