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2. Faucet aerator - Wikipedia

   en.wikipedia.org/wiki/Faucet_aerator

   When an aerator is added to the faucet (or fluid stream), there is a region of high pressure created behind the aerator. Because of the higher pressure behind the aerator and the low pressure in front of it (outside the faucet), due to Bernoulli's principle there is an increase in velocity of the fluid flow.

3. Tap (valve) - Wikipedia

   en.wikipedia.org/wiki/Tap_(valve)

   Turning a valve knob or lever adjusts flow by varying the aperture of the control device in the valve assembly. The result when opened in any degree is a choked flow . Its rate is independent of the viscosity or temperature of the fluid or gas in the pipe, and depends only weakly on the supply pressure , so that flow rate is stable at a given ...

4. Low-flow fixtures - Wikipedia

   en.wikipedia.org/wiki/Low-flow_fixtures

   Faucets that meet energy efficiency standards for WaterSense mustn’t use more than 1.5 gpm, a 32% decrease in flow rate over the federal requirement. [10] Reduced flow faucets often make use of flow restrictors or faucet aerators to reduce the flowrate of the water. Using a faucet with an aerator results in an average 42% reduction in water ...

5. Backflow prevention device - Wikipedia

   en.wikipedia.org/wiki/Backflow_prevention_device

   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.

6. Ballcock - Wikipedia

   en.wikipedia.org/wiki/Ballcock

   It consists of a valve connected to a hollow, sealed float by means of a lever mounted near the top of the tank. The float is often ball-shaped, hence the name ballcock. The valve is connected to the incoming water supply, and is opened and closed by the lever which has the float mounted on the end. When the water level rises, the float rises ...

7. Elie Aghnides - Wikipedia

   en.wikipedia.org/wiki/Elie_Aghnides

   Elie Prodromou Aghnides (1901–1988) was a Greek engineer and inventor, best known for his invention of the faucet aerator. He was born in Istanbul , Ottoman Empire, in 1901. He had three siblings: Nicholas Aghnides, a former professor at Columbia University ; Thanasis Aghnides, a Greek ambassador and undersecretary to the United Nations in ...