A blocked sewer line can be caused by a variety of factors, including:
- Tree roots growing into the pipes
- Fats, oils, and grease buildup
- Non-flushable items being flushed down the toilet
- Too much toilet paper
- Sanitary products being flushed down the toilet
- Foreign objects being flushed down the toilet
- Age and corrosion of the pipes
- Ground movement or settling that can damage the pipes
It is important to note that many of these causes can be prevented by being mindful of what is put down the drains and toilets in the home.