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2. Plumbing fixture - Wikipedia

   en.wikipedia.org/wiki/Plumbing_fixture

   Sensor-operated toilets also have automatic flush. Sensor-operated faucets and showers save water. For example, while a user is lathering up with soap, the fixture shuts off and then resumes when the user needs it to. Sensor-operated soap and shampoo dispensers reduce waste and spills that might otherwise represent a slippage hazard.

3. Tap (valve) - Wikipedia

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

   Faucet is the most common term in the US, similar in use to "tap" in British English, e.g. "water faucet" (although the term "tap" is also used in the US). Spigot is used by professionals in the trade (such as plumbers), and typically refers to an outdoor fixture.

4. Low-flow fixtures - Wikipedia

   en.wikipedia.org/wiki/Low-flow_fixtures

   Low-flow kitchen faucets can cause the filling of a pot to take a long time. In addition, performance issues with low-flow faucets often pertain to their ability to properly rinse or wet. In the United States the EPA's WaterSense has established minimum flow rates for lavatory fixtures to ensure satisfaction with low water pressures. [20]

5. 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.

6. Atmospheric vacuum breaker - Wikipedia

   en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

   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.

7. Pressure-balanced valve - Wikipedia

   en.wikipedia.org/wiki/Pressure-balanced_valve

   Conversely, if someone opens a hot water faucet elsewhere, the relatively higher pressure in the cold water supply line will cause the shower temperature to drop suddenly. This is described in US patent 3674048. [1] The pressure-balanced shower valve compensates for changes in water pressure.

8. Key (engineering) - Wikipedia

   en.wikipedia.org/wiki/Key_(engineering)

   The tapered key is tapered only on the side that engages the hub. The keyway in the hub has a taper that matches that of the tapered key. Some taper keys have a gib, or tab, for easy removal during disassembly. The purpose of the taper is to secure the key itself, as well as to firmly engage the shaft to the hub without the need for a set screw.

9. Forensic firearm examination - Wikipedia

   en.wikipedia.org/wiki/Forensic_firearm_examination

   Spent cartridges found at a scene can be examined for physical evidence such as fingerprints or compared to samples that match them to a weapon. The examination of the cartridge relies on the unique tool marks left by the various parts of the weapon including the firing pin and the ejector in semi and fully automatic firearms. These markings ...