Sewer Camera Inspection
See inside the sewer line before you decide on a repair, a sale or a city rebate.
Plumbing guide
Tree Roots in a Sewer Line: Signs, Fixes and Prevention
Roots do not break a healthy pipe. They find a small crack or a loose joint, grow in and keep growing. Clearing them without fixing the opening only buys time.
By the Urban Comfort Plumbing team ·
How roots get into a sewer pipe
Sewer pipe carries warm, nutrient-rich water. Moisture and nutrients escape through tiny cracks and loose joints, and roots grow toward them. A hair-thin root enters the opening, then thickens inside the pipe, catches paper and waste, and the blockage builds. Over a few seasons, a fine root can become a dense mat that fills the pipe.
Older materials are most at risk. Clay pipe comes in short sections with many joints, each of which can open slightly. Orangeburg, a tar-and-fiber pipe used in some mid-century homes, can deform and let roots in. Modern plastic pipe with glued or gasketed joints is far more resistant, though a break or a poorly seated joint can still admit roots.
Signs that roots may be the problem
Slow drains in more than one fixture are the leading sign, particularly the ones at the lowest point in the house. Gurgling toilets, bubbles in a tub when the washing machine drains and a sewer smell outside are others. A drain that clears and then blocks again within weeks, often right after a cable cleaning, is a classic sign.
Look at the yard. A lush, greener strip of lawn along the line, or a sunken or soggy patch, can show a leak. Trees and large shrubs close to the line are suspects, and so are old trees whose roots reach far beyond their canopy.
What a camera shows
A sewer camera runs through the line and shows roots, cracks, offsets and the pipe material directly. The footage shows where the roots entered, how thick they are and how much of the pipe is blocked. It also shows whether the pipe is otherwise sound or whether the damage is widespread.
That information decides what to do next. A line with a single joint intruded by roots is a different job from a line cracked along its length. See sewer camera inspection for what a good inspection includes and how to read the findings.
Clearing the roots
A cable machine with a cutting head grinds roots out of the pipe. It restores flow quickly but leaves the stumps and the opening. Hydro jetting uses high-pressure water to scour the pipe wall and clear the debris, and it tends to give a cleaner result. A camera should come first, since jetting is not suited to every pipe.
Both methods are temporary if the opening remains. Roots will grow back, sometimes within a year. If the pipe is in good shape, a periodic cleaning schedule can keep it under control. If the pipe is damaged, repair is the real answer.
Fixing the pipe
A spot repair digs down to the damaged joint or section, cuts out the pipe and replaces it. Pipe lining, which cures a new liner inside the old pipe, seals the cracks and joints from inside, and it can work when the pipe is intact enough to hold the liner. The city's guidance says Orangeburg pipe must be replaced and cannot be lined.
When damage runs along most of the line, replacement makes more sense. See sewer line repair and sewer line replacement for the options, and ask the plumber to show the camera footage that supports the recommendation.
Do chemical root killers work?
Foaming root killers contain chemicals that kill roots in contact with them, and they can slow regrowth for a time. They do not repair the opening, and they should be used with care. Some chemicals can harm pipes, septic systems and the environment, and they do not remove the roots already in the pipe. They are a maintenance tool at best, not a repair.
If a product is used, follow the label and keep it away from septic systems. A plumber can say whether it makes sense for your line.
What happens if roots are ignored
A root mass grows. The pipe fills a little more each season, and one day a heavy use of water, such as a load of laundry and a shower at the same time, tips it into a full backup. Sewage rises in the lowest fixture in the house, usually a floor drain or a first-floor tub, and the damage can be costly and unpleasant to clean.
Roots also widen the cracks they enter, which turns a small repair into a larger one. Catching the problem early, when the pipe is mostly intact, keeps the options open, including lining or a short spot repair.
Buying or selling a house with root trouble
A camera inspection is a standard step for an older house, and the footage can be saved and shared. If roots are found, a buyer can ask for a repair or a credit. A seller who has already had the line repaired or lined can offer the paperwork. Either way, a documented inspection removes guesswork from the negotiation.
How often to schedule maintenance
If a line has a history of root growth and the pipe is otherwise sound, a cleaning every year or two keeps it flowing. A camera pass after each cleaning shows how fast the roots return. If they are back within months, the pipe needs repair, not another cleaning. Keep the footage so you can compare year to year.
Prevention and responsibility
Plant trees away from the sewer line, and avoid species with aggressive roots near it. A cleanout in the yard gives access for cleaning and inspection. If you are buying an older house, a camera inspection before closing tells you what the lateral looks like.
In St. Petersburg, the owner is responsible for the sewer lateral inside the property line, and repairs need a licensed plumbing contractor and a permit. The city has offered a rebate program for private lateral work, but terms change, so confirm with the city first.
Common questions
Tree root questions
Slow drains in several fixtures, gurgling, repeat clogs and a sewer smell outside are signs. A camera inspection shows the roots directly.
It clears the blockage, but the roots grow back unless the opening in the pipe is repaired.
They usually enter through cracks and joints that already exist, then widen them as they grow.
In St. Petersburg, the owner is responsible for the private lateral inside the property line.
Related services
Hydro Jetting
Scour grease, scale and roots from a line that a snake could not fully clear.
Sewer Line Repair
Fix a cracked, rooted or sagging sewer pipe, from spot repair to a longer section.
Drains slow in more than one place?
Call and describe it. A camera inspection is usually the first step.