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An air gap, as related to the plumbing trade, is the unobstructed vertical space between the water outlet and the flood level of a fixture. [1] Air gaps of appropriate design are legally required by water health and safety regulations in many countries. An air gap is the simplest form of a 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. A simple air gap has no moving parts, other than flowing water.
This may be a small gap, such as provided by a tundish (a combined overflow spout and catch funnel) or a large gap, such as a basin tap being above the maximum level of the water in the basin. Standards for these air gaps group them by the amount of separation that they provide and their acceptability for the various risk categories. [ 3 ]
Plumbing installation and repair work on residences and other buildings generally must be done according to plumbing and building codes to protect the inhabitants of the buildings and to ensure safe, quality construction to future buyers.
Zillow's top 10 hottest housing markets of 2025. The primary reasons Buffalo was number one again, according to Zillow? Job and wage growth, relative affordability and demand that outweighs supply.
Zendaya still thinks about her 2013 stint on “Dancing with the Stars.” The runner-up on Season 16 of the ABC dance competition series told W in a recent interview that she wished she had not ...