Common problem · TN LLP #5045
Tree Roots in the Sewer Line
Roots finding a joint or crack and filling the pipe.
Quick answer
Common and fixable. Roots do not break into a sound pipe — they find a joint or crack that is already leaking and grow toward the water. Clearing them helps; finding where they are getting in is what stops it coming back.
Root intrusion is the single most common cause of repeat sewer trouble in older neighbourhoods, and this area has plenty of them. Cast iron and clay lines laid decades ago have joints every few feet, and a mature tree will find any one of them that has started to weep.
How you know this is it
- Repeated main line backups, often worse in spring and after heavy rain
- Slow drainage across the whole house that gradually gets worse
- Gurgling from the lowest drains
- Large trees within twenty or thirty feet of where the sewer line runs
What usually causes it
- Clay or cast iron pipe with joints every few feet, standard in older construction
- A joint that has shifted with ground movement and started to seep
- An existing crack that a root has followed to the water inside
- Shallow lines under mature trees, common on older lots
What we do about it
- Clear the roots so the line drains again
- Camera the line to find exactly where they are entering and how bad the pipe is there
- Show you the footage so the decision is yours and not a matter of trust
- Repair the failed joint or section where that is enough
- Replace the run when the pipe is genuinely finished
Common questions
Tree Roots in the Sewer Line: your questions answered
Do I have to take the tree out?
Do the chemical root killers work?
How bad is it likely to be?
Are you licensed?
Get service
Book Drain Pros TN for sewer camera inspection.
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TN Limited Licensed Plumber · #5045 · verify at verify.tn.gov
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