Historically, sewage lines were placed beneath the area that they were meant to collect waste from. This allowed the use of gravity to ensure that all waste materials were brought down standard plumbing pipes to a main sewer line where they would then be transported for processing. In situations such as basements where washing machines and bathrooms are present, the devices are often below the sewer line and gravity is ineffective. In these cases, some form of a sewage pump is needed to force the materials up to the level of the sewer lines in order to be processed. A sewage ejector pump is one of the most common residential types that can be used for such purposes.
Residential sewage ejector pumps can be found in two main designs. A vertical suspension model is one where the motor is located on the basin cover and attached via a shaft to the pump housing inside the basin. A close-coupled submersible ejector pump contains both the motor and the pump within the basin connected via a shorter shaft. Both of these designs are also available in larger sizes, ideal for industrial and commercial applications.
The two types of sewage ejector pumps are classified as either grinders or non-clogs. A grinder pump does just as the name implies and essentially shreds or grinds larger waste matter into smaller pieces under 2 inches wide that are more easily able to pass through the narrow pipes. Grinder systems are usually ideal for residential applications that may not receive frequent use. Non-clog systems typically contain slightly larger piping and can handle material up to 4 inches wide. Non-clog systems are typically found more frequently in situations when larger volumes of waste matter are being processed on a regular basis.
The size of sewage ejector pump needed relies on two major factors, the distance between the pump itself and the sewage or septic line the waste material needs to be transported to and the size and volume of the waste material that will regularly need to be processed. Units with higher horsepower are ideal for situations where waste material needs to be moved further, while larger units should be considered for areas that will get regular use and potentially be processing larger forms of waste matter.
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