There are many reasons why your floor drain could be backing up. A couple of common causes include:
- Mainline backups: These often show up first in your floor drains. If you flush a toilet and you see water coming up your floor drain, this means your sewer line is clogged. You’ll need to unclog the main sewer line as well as the floor drain to resolve the problem.
- Lint and debris: Appliances such as washing machines can clog the floor drain with lint or other debris. It’s also possible for grease and food from kitchen lines to clog the floor drain too.