Tree roots in your sewer line. Signs, and what actually works.
Roots are one of the most common causes of mainline trouble in older LA and Valley neighborhoods. Here's how they get in, how to confirm they're there, what you can and can't do yourself, and how the real fixes compare.
Updated October 2026 · Rooter Pros, Burbank-based mobile plumber · CSLB #917630
What you'll need
No digging required:
- The pattern — which drains clog, and how often
- A look at your trees — big ones near the path from the house to the street
- Your cleanout location — so a camera or jetter can get in
- About 20 minutes — to confirm your suspicion
Confirm it in 4 steps.
Roots have a signature — a pattern you can spot before spending anything. Work through these in order.
Map the pattern
Roots tend to cause recurring clogs — the same main-line backup every few months, often a little worse each time and sometimes worse in spring and summer when trees are growing. One random clog is just a clog; a schedule suggests roots. Write down which fixtures back up and when.
Look at your trees
Large, thirsty trees growing near the line are the usual suspects — ficus, pepper, magnolia, sycamore and big shade trees are common in LA yards and parkways. The line usually runs from the house toward the street, often near the cleanout; walk that path and note what's planted along it.
Understand how they get in
Roots don't punch through sound pipe. They find moisture at existing joints and hairline cracks and grow in. Clay pipe has joints every few feet, cast iron corrodes and cracks with age, and Orangeburg fiber pipe deforms — which is why older homes get hit hardest. See how each pipe material fails.
Get a camera inspection
A camera inspection shows the root mass, where it's entering and the pipe's condition — and whether you're looking at a cleaning or a repair. Ask for the recording.
The fixes, compared honestly.
DIY can't remove roots from a main line. Here's what each professional option does — and doesn't.
Root foaming
A foaming herbicide is pushed through the line to kill and slow root regrowth at the joints. It can help between cleanings on a line that's otherwise sound, but it doesn't remove an existing root mass or seal the joint they came through. Follow product labels and local rules — don't pour random chemicals down the cleanout.
Hydro jetting
A jetter with a root-cutting nozzle shreds the root mass and flushes it out, and we camera the line afterward so you can see it's clear. On a sound pipe it buys a long stretch of normal flow — but roots will try again through the same open joints. Hydro jetting.
Relining or replacement
Cured-in-place lining puts a seamless new pipe inside the old one, closing the joints roots use. If the pipe is collapsed, badly offset or bellied, replacement — trenchless bursting or a conventional dig — is the fix.
What you can do — and what to skip
Yourself: keep wipes and grease out of the line so roots have less to catch, know where your cleanout is, and plant new trees well away from the sewer path. Skip the hardware-store crystals poured down a toilet: copper sulfate and similar products can burn back fine roots for a while, but the root mass and the open joint stay — and rental snakes rarely clear a root ball, often leaving cable stuck in the line.
When to call a pro.
Roots don't fix themselves. Call when any of these fit:
Backups on a schedule
The same main line backing up every few months is the classic root pattern. Jetting clears it; the camera tells you whether lining or repair will stop it.
You want proof before you pay
A camera inspection shows the roots on screen — the mass, the entry point and the pipe condition. You keep the recording.
The pipe is damaged, not just blocked
Roots widen cracks as they grow. If the camera shows broken or collapsed sections, it's a repair, not another cleaning. Read the signs your sewer line is failing.
Rooter Pros is open 24/7 — flat-rate pricing agreed before work starts.
Call (818) 669-9019Tree root FAQ
Straight answers, no sales pitch.
How do tree roots get into sewer pipes?
Through joints and cracks. Clay and cast-iron pipes have joints and age-related cracks, and roots follow the moisture escaping through tiny gaps. Once inside, they grow into a mass that catches everything flowing past.
Will the roots go away if I cut down the tree?
Not right away — roots already in the pipe can persist and decay slowly, and the pipe damage stays. The line still needs cleaning or repair even with the tree gone.
Does hydro jetting remove tree roots?
Yes — a jetter with a root-cutting nozzle shreds the root mass and flushes it out, and we camera-verify the line afterward. If the pipe underneath is cracked or collapsed, that's a repair, not a cleaning.
Is root foaming worth it?
It can be a reasonable maintenance step on a sound pipe between cleanings. It doesn't remove an existing blockage or repair the joint, so it isn't a substitute for jetting or relining a damaged line.
Which trees are worst for sewer lines?
Large, fast-growing, thirsty trees planted near the line are the biggest risk. Any big tree close to an older clay or cast-iron lateral is worth watching.
Roots winning the rematch?
If this doesn't work or you'd rather not mess with it, call (818) 669-9019. 24/7 emergency service · Free estimates · Upfront flat-rate pricing