Basement Flooding – Sewage Backup


Your basement can flood at any time, even if it has never flooded before. Although most flooding occurs during heavy rain, the worst type of flooding is triggered by sewage backup. Sewage backflow must be corrected quickly as the water involved carries lots of debris, smells horrible, and is liable to make you and your family sick.

The Cause of Sewage Backup

When it rains heavily, the sewage system often becomes filled with more waste and water than it can handle. When this happens, the excess sewage and water need somewhere to go. Unfortunately, the only place for them to go is your basement. As such, the water and waste flows backwards and finds its way into your basement.


flooding diagram


Solutions for Sewage Backup

One of the best ways to prevent sewage backup is to install a backwater valve in your basement. This valve is located in the floor with a cover. When the sewage tries to come up rather than go down, the flap inside the valve will automatically close off the opening. That way, sewage will be unable to enter your home.

If you already have a valve but still experience sewage backup, you probably need to clean it out. The valve must be cleaned regularly to ensure that the flap can close freely. You should also make sure that your shut-off valve is inspected at least once per year. You can hire a professional to come and inspect your basement drainage system or you can do it yourself. At the very least, your local plumber can come out and show you the process you need to follow when inspecting it. For a limited time, you can take advantage of a Free Sewage Flood Consultation from Public Plumbing.


If you have a basement, you are going to experience some type of drain backup sooner or later. Knowing what to expect and how to correct the problem quickly will aid you in preventing sewage floods in the future.