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In some occasional cases, a sink may have both a potable (drinkable) and a non-potable water supply. Lavatories and water closets normally connect to the water supply by means of a supply, which is a tube, usually of nominal 3/8 in (United States) or 10 or 12 mm diameter (Europe and Middle East), which connects the water supply to the fixture ...
Water pressure may fail or be reduced when a water main bursts, pipes freeze, or there is unexpectedly high demand on the water system (for example, when several fire hydrants are opened). Reduced pressure in the pipe may allow contaminated water from the soil , from storage, or from other sources to be drawn up into the system.
In 1952, the concept of installing perforated pipes in dams was introduced to control water levels at the Northeastern Wildlife Conference as a solution for problem beaver ponds. [11] In 1963, Laramie reported that the New Hampshire Fish and Game Department had successfully installed and maintained beaver pipes in 46 dams. [ 12 ]
In some cases, impressed current cathodic protection (ICCP) systems are used. These consist of anodes connected to a DC power source, often a transformer-rectifier connected to AC power. In the absence of an AC supply, alternative power sources may be used, such as solar panels, wind power or gas powered thermoelectric generators. [14] [15]
Old water pipe, remnant of the Machine de Marly near Versailles, France. Lead was the favoured material for water pipes for many centuries because its malleability made it practical to work into the desired shape. Such use was so common that the word "plumbing" derives from plumbum, the Latin word for lead.
Watts Water Technologies, Inc. is an American manufacturing company based in North Andover, Massachusetts, that makes valve products for plumbing and heating, such as water pressure regulators and other valves. [1] Watts is one of the largest manufacturers of water valves in the United States. The company was founded by Joseph Watts. [2]
A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. [1] This enables the direct control of flow rate and the consequential control of process quantities such as pressure , temperature , and liquid level.
A related term sealing current (aka wetting current or fritting current) is widely used in the telecommunication industry describing a small constant DC current (typically 1-20 mA) in copper wire loops in order to avoid contact oxidation of contacts and splices.
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