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Covered sewers are buried below the frost line to avoid freezing, and deep enough to receive gravity flow from anticipated wastewater sources. [2] Long gravity sewers may require significant excavation depths or tunneling to maintain acceptable gradients near the sewer outfall.
A partially obstructed discharge line can force a sump pump to work harder and increase its chance of overheating and failure. [7] Float switches are used to automatically turn the sump pump on when water rises to a preset level. Float switches must be kept clear of any obstructions within the sump.
The frost line—also known as frost depth or freezing depth—is most commonly the depth to which the groundwater in soil is expected to freeze. The frost depth depends on the climatic conditions of an area, the heat transfer properties of the soil and adjacent materials, and on nearby heat sources.
Where it is impossible or impractical to discharge sewage from a property into a gravity sanitary sewer, a pressure sewer may provide an alternative means of connection. A macerator pump in a pumping well close to the property ejects sewage through a small diameter high pressure pipe into the nearest gravity sewer. [9]
A pump for household use is usually 1 hp, 1.5 hp or 2 hp. A cutting mechanism macerates waste and grinds items that are not normally found in sewage, but may get flushed down the toilet. The pump has a level sensor either built into the pump, called “sensing bells,” or attached externally to the pump, typically a float switch. (The level ...
Days of freezing temperatures in Deep South areas that usually freeze for only hours are threatening dozens of water systems as burst pipes leak millions of gallons of water. The problems were ...
For this reason, vacuum sewer lines may even be laid in the same trench as potable water lines (depending on local guidelines). In order to ensure reliable transport, the vacuum sewer line is laid in a saw-tooth (length-) profile. [5] The whole vacuum sewers are filled with air at a pressure of -0.4 to -0.6 bar.
However, with the sump pump example, the water is coming from another property, so you may need to investigate if you can collect damages from your neighbor's homeowners insurance company.
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