A single clog is usually simple: hair, soap or food gets caught and slows the water down. But when the same drain backs up repeatedly, store-bought drain cleaner and a plunger are only treating the surface. Here's what's often really going on.
Common Causes of Repeat Clogs
- 1
Grease and soap buildup
Grease, oil and soap scum coat the inside of pipes over time, narrowing the space water can flow through until even small debris gets stuck.
- 2
Tree roots in the sewer line
Roots can grow into small cracks in older sewer lines, creating a snag point that catches waste and paper every time.
- 3
A sagging or bellied pipe
Over time, a section of pipe can sink slightly, creating a low spot where water and debris pool instead of flowing through.
- 4
Partial blockages left behind
A plunger or over-the-counter cleaner can clear enough of a clog to let water pass again, while leaving material behind that catches more debris later.
Quick tip: If more than one drain in your house is slow at the same time, the problem is likely in your main sewer line, not an individual fixture.
How We Find the Real Cause
Rather than guessing, we use drain snaking and camera inspection to see exactly what's blocking the line and where. That tells us whether the fix is a simple cleaning or something more involved, like root removal or a pipe repair.
When to Stop DIY-ing It
If you've tried a plunger and a drain cleaner more than once on the same drain, it's time to call. Repeated chemical drain cleaner use can actually damage older pipes, making the eventual repair more expensive.