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Alternative sump pump systems can be driven by municipal water pressure. Water-powered ejector pumps have a separate pump, float and check valve. [4] The float controlling a backup pump is mounted in the sump pit above the normal high water mark. Under normal conditions, the main electric powered sump pump will handle all the pumping duties.
A pedestal sump pump with a float switch. A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float.
The operation of the pump is controlled by a float switch in the pumping well. The pumping well is sized to allow for periods of power outage or pump maintenance. [ 1 ] The discharge pipe may be as small as 50 mm diameter carrying sewage at very high flow rates.
Dry running protection, also known as dry-run protection or dry-running protection, is a type of protection mechanism to prevent a rotor, pump or stirrer shaft from operating without any medium added, as the bearing and shaft seal might be damaged if the motor is run while dry. [1]
In most cases, they replace mains pressure with the pressure of that from a raised gravity cistern. Common examples of an air gap in domestic plumbing are: Taps above washbasins; Cold water cisterns, where the float valve outlet must be above the overflow water level. The previous practice of taking a "silencing tube" from the float valve to ...
The pump may discharge to another gravity sewer or directly to a treatment plant. [6] Force mains are typically constructed of welded steel or HDPE jointed to resist pressures within the pipe. Force mains are substantially different from pressure sewers which serve individual properties or groups of properties and provide a means of injecting ...
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