What’s a backwater valve? It’s a device installed in your sewer line that helps prevent sewage from backing up into your home during heavy rain or blockages. Inside, there’s a flap that automatically closes when water tries to flow backward. That simple mechanism protects your basement from flooding and contamination. Basically, it acts like a one way gate ,letting wastewater leave your home, but stopping anything from coming back in. Today I’m snaking the sewer through the backwater valve to cl