Sewage Ejector Pumps

Sewage ejector pumps, or sewage grinder pumps, are designed to pump residential or household sewage or blackwater to a destination such as an elevated septic tank or to a city sewer (for homes whose lower baths are at a depth below the level of their sewer line).

Even if a building is nearly at the same level as its septic tank or sewer line, if the geography of the site prevents sewage from flowing fast enough on its own (two-feet per second) then a sewage grinder or sewage ejector pump is needed.

A typical application of a sewage ejector pump is in a home where a basement bathroom is located lower than the height of the sewer line which leaves the home. The sewage ejector pump lifts waste from the basement bathroom up to the sewer line where it flows out to a septic tank or community sewer.

A sewage or septic grinder pump, (there is more than one grinding method) reduces sewage to a finely ground slurry of waste and water which can then be pumped or forced to its destination. In the sewage grinder pump photo shown at above left, the number of wires and pipes at the tank tells us that this is a duplexed or two-pump system with two grinder pumps, two drains, and a tank alarm as well (the center wires).

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