|"Basement flooding due to sewer backup is an all too frequent occurrence in certain areas during heavy rainstorms. Many people are not aware that they can modify the plumbing in their houses to positively prevent sewage from entering their basements."|
Prevent Sewage From Flooding Your Basement!
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Basement flooding due to sewer backup is an all too frequent occurrence in certain areas during heavy rainstorms. Many people are not aware that they can modify the plumbing in their houses to positively prevent sewage from entering their basements. Three different approaches are common and the one you choose depends on the piping layout of your house.
Determine what plumbing arrangement your home has:
In the most basic type of basement plumbing, the basement drains are joined directly to the sewer pipe before it leaves the house. This plumbing is found in many older homes with basements and no sump pumps. Both sewage and footing drain water enter the sanitary sewer. Excessive footing drain flow from a residence may or may not cause flooding in that particular home. The footing drain flow contributes to any sewer or basement flooding that may occur. Your home may also have one of the following basement plumbing enhancements. Whatever your current plumbing arrangement, there usually are further steps that can be taken to prevent basement flooding.
Three common plumbing upgrades:
Upgrade #1: Add a Sump Pump
A sump pump is needed as part of any corrective measure. The sump pump removes the footing drain water from around the basement wall and discharges it to the surface of the ground, a ditch, or a storm sewer, depending on the surface grading around the house. Many communities require that new homes include sump pumps. Sump pumps in new homes usually discharge to the storm sewer system.
To protect a basement from flooding due to sewer backup, the plumbing fixtures and floor drain in the basement also need to be disconnected from the municipal sewer.
A sump pump, including the basement fixture disconnection, can be installed in existing homes for about $1600 or more. Each home is different.
Upgrade #2: Add a Sump Pump and Valves
If a sump pump is not sufficient, a check valve and a shut-off valve can be installed to provide a good measure of protection from basement flooding. These valves can isolate the house plumbing from the public sewer in the street. The check valve includes a flapper that shuts when water level in the public sewer is high enough to flow back into the house. The shut-off valve can be manually closed as an added measure of protection. The shut-off valve will also need to be closed if debris becomes lodged in the check valve preventing its full closure.
The homeowner will need to discontinue or, at least, sharply curtail the use of the sanitary facilities while the potential for flooding exists. During this time, showers, the clothes washer, and dishwasher cannot be used.
Both the sump pump and the valves can be installed for a total cost of about $2800 or more. Each home is different.
Upgrade #3: Add a Sump Pump and an Ejector Pump
An ejector pump can provide still further protection. An ejector pump can be installed to pump the sewage into the public sewer whether it is flooded or not. If there is a power failure, the homeowner will need to discontinue use of the sanitary facilities.
Both the sump pump and the ejector pump can be installed for a total cost of about $4400 or more. Each home is different.
© 2002 Arthur A. Schrage, P.E.
Editor Note: Arthur A. Schrage is a Professional Sanitary Engineer with over 30 years experience in the industry and is available for consultation, project,
and contract work in the Detroit Metro area.
Note: This article was submitted by a second party and the contents are subject to our disclaimer.
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