What is a cross connection sump pump?
A cross connection happens when a sump pump is connected to a sanitary sewer line. Often, this can be a hose leading into a laundry tub or a floor drain. Sump pumps are supposed to drain into storm sewers, either through a direct connection (a pipe from the home connecting with the main storm sewer line), or by draining directly onto the ground through a pipe or hose outside the home.

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1. What is a cross connection sump pump?
2. Why are cross connections a problem?
3. How do I know if I have a cross-connected sump pump?