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Sewage-Ejector Pumps

Sewage-Ejector Pumps

A sewage ejector pump, also called pump up ejector system, is used when a bathroom, laundry room, or any other type of plumbing fixture is installed below the main sewer or septic line grade. Sewage ejector pumps are usually installed in basements. The ejector pump is part of a system that can pump both liquids and solids up into the sewer or septic line. Because of elevations in the low country it is not uncommon that we have pumps in our homes.

Many commercial sites also have large sewer ejector systems which Mr. Rooter can service and design as well.

Sewage ejector pumps are meant to sit in a sump basin that is cut and dug into the ground below grade.

The sump basin collects and holds about 30 gallons of waste on average for an average sized home. The drain lines from the various fixtures in the basement area are graded into the side of the sump basin. When the level of waste water in the sump basin reaches a certain height a float on the sewage ejector pump is tripped. The waste water is then pumped out of the basin and up to ground level and then out to the sewer to septic. Once the level in the basin goes down the pump turns off until the next time it needs to pump.

A vent is required for a sewage ejector pump installation. The vent comes out of the sump pump and is connected into an existing vent stack or runs up and through the roof. The common outlet size after the sewage ejector pump is 2”. After the pump outlet line there is always a check valve to make sure that nothing drains back into the sump basin after the waste water is pumped out.

The top of the sump basin is sealed so that no waste or smell can come out of the top of the basin when it is installed properly.

Before starting a project that would require the installation of a sewage ejector pump it is a good idea to check with your local building department. Different areas have different plumbing and building codes and permit requirements.

Any work involving septic or sewer lines is likely to a plumbing permit with good reason. One can only imagine the mess this can create if not installed properly. So, to be safe find out what is required to install a sewage ejector pump legally before you begin. It also wouldn’t hurt to get an estimate from Mr. Rooter before deciding to do this project yourself.

Another thing to consider carefully is the size of the ejector pump that you will need. There are pumps that come in various sizes (horsepower) and basins with different hold capacities. For the average residential installation a standard pump kit is usually enough but you can compare prices, specs and features to make sure you pick the system for your project.

Sewage ejector pumps are available at local home improvement stores, online, and through your local plumbing supply house. Sewage ejector pumps are also available for commercial applications, but that can require a much larger sump basin.

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