Open-trench replacement is the traditional approach: dig along the pipe, remove the old line, lay a new one on proper bedding at the right slope, inspect it and backfill. It disturbs more of the yard, but it gives the crew full control over grade, connections and material. On some Fullerton properties, particularly where the lateral runs under open lawn with nothing in the way, that control can outweigh the disruption.
Trenchless work shines where the ground above is valuable or hard to replace, such as driveways, mature landscaping, patios and trees. The question is rarely trenchless or not in the abstract. It is which sections of your line suit which method, given what the camera found and what sits above the pipe.
Trade-offs at a glance
Trenchless (bursting or lining)
- Small pits or no digging beyond a cleanout
- Hardscape and landscaping largely spared
- Depends on the old pipe's path and condition
- Limited ability to correct grade
Open trench
- Full control over slope and bedding
- Every connection visible and accessible
- More digging, more restoration
- Works even where the old pipe is gone
Conditions that often push toward digging
- A collapse the camera and cable cannot get past
- Severe or repeated bellies along the run
- Pipe that needs a new route, not just a new pipe
- Utilities crowded around the sewer where bursting would displace soil
- A very short, shallow run under open lawn
- Unknown sections the camera could not inspect
How a combined job might work
Many replacements mix methods. A typical combined plan looks like this.
- Dig the problem spot.A pit is opened at a collapse or deep belly so that section can be repaired or re-laid.
- Use the pit as access.The same opening can serve as a launch or receiving point for bursting or lining the rest of the run.
- Join the sections.The repaired section and the trenchless section are connected with appropriate couplings or transitions.
- Film the whole line.A final camera run confirms that every section and transition is sound.
Questions to ask when digging is proposed
- Why is excavation better for this section than bursting or lining?
- How long and how deep will the trench or pit be?
- Could part of the line still be done trenchless?
- What will be restored afterward, and what will be left to me?
Common questions
Is trenchless always less disruptive?
Usually it opens less ground, but pits are still needed for bursting, and a combined job may involve some digging anyway.
Does open-trench replacement need a permit too?
Sewer lateral replacement commonly needs a permit regardless of method. Check with the City of Fullerton for what applies to your job.
Can I ask for a quote on both approaches?
Yes. Asking a contractor to price or explain both methods for your line is a good way to understand the trade-offs.
General information for Fullerton, not a quote or professional advice. In an emergency, call 911.