The sewer lateral is the pipe that carries everything from the house to the public sewer, usually under the front yard and sometimes under the parkway strip by the street. In homes built in the 1960s and 70s, laterals were often clay pipe in short sections, or cast iron, joined at regular intervals. As decades pass, joints shift slightly and develop small gaps.
Warm, moist air and a trickle of water escape from those gaps, and tree roots grow toward them. A hair-thin root enters the joint, finds water and nutrients, and branches into a fine mass inside the pipe. Paper and grease catch on it, and eventually the line slows or stops. Mature trees along Cypress streets and in front yards make this a familiar problem.
Signs roots may be involved
Root treatment options compared
| Option | What it does | Limits |
|---|---|---|
| Cable with a root cutter | Cuts roots back and restores flow | Roots usually grow back through the same joints |
| Hydro jetting | Cuts roots and scours buildup from the walls | Needs pipe sound enough for the pressure |
| Spot repair | Replaces a damaged section, often by digging | Only fixes the section that is dug up |
| Pipe lining | Places a new liner inside the old pipe, sealing joints | Needs a pipe that can be cleaned and is not collapsed |
| Lateral replacement | New pipe, by excavation or trenchless methods | Largest project; usually needs a permit |
A typical sequence for a root clog
- Restore flow.The line is cleared through the cleanout with a cable and root-cutting head, which gets the house working again.
- Camera the line.A camera shows where the roots entered, how many joints are affected and whether the pipe is cracked, offset or sagging.
- Decide on maintenance or repair.Roots at one joint in otherwise sound pipe may be managed with periodic cleaning. Widespread intrusion or broken pipe usually points toward repair or lining.
- Check responsibility near the street.If the damage is near or under the sidewalk or street, check with the City of Cypress about who is responsible for that part of the lateral.
Questions to ask after a camera inspection
- How many joints show roots, and how far from the cleanout are they?
- Is the pipe cracked, offset or sagging, or just root-intruded?
- Can I see the footage and get a copy?
- What is the case for maintenance cleaning versus repair or lining?
- Does any recommended repair need a permit from the city?
Common questions
Will root killer products fix the problem?
Some products can slow root regrowth, but they do not open a blocked line or seal the joints roots came through. Ask a plumber whether one makes sense for your pipe.
How often do roots come back after cutting?
It varies with the tree, the season and the size of the gaps. A camera inspection gives a better idea than any rule of thumb.
Is PVC pipe immune to roots?
Glued PVC joints resist roots much better than old clay joints, which is one reason replacement or lining can end repeat root clogs.
General information for Cypress, not a quote or professional advice. In an emergency, call 911.