Methods
Trenchless describes a family of methods with different capabilities, not a single product and not a guarantee that your yard stays untouched. Whether any of them apply to your line is a conditions question that only evidence can settle.
These are frequently marketed under one word. They solve different problems, and the difference between them is what you are really choosing.
Method 01
A resin-saturated liner is drawn or inverted into the existing pipe and cured, forming a new pipe wall inside the old one.
RequiresA host pipe that is continuous, sufficiently open and not collapsed. Because the liner follows the existing pipe, it preserves the current line and grade rather than correcting them.
How is the cured liner verified, and how are any branch connections reinstated?
Method 02
A short liner is installed across a specific defect instead of the full run.
RequiresA genuinely isolated defect, with footage showing the pipe on either side is serviceable.
What does the rest of the inspected run look like, and why is a section sufficient?
Method 03
A bursting head is pulled through the old pipe, fracturing it outward while drawing new pipe into the same corridor. It replaces the pipe rather than relining it.
RequiresAccess pits at each end, a workable alignment, soil and site conditions that tolerate displacement, and clearance from nearby utilities.
Where do the pits go, what utilities were located, and what happens if a conflict is found?
Every trenchless method needs somewhere to enter and exit the pipe. That may be an existing cleanout, or it may be an excavated pit — sometimes two. The honest framing is reduced excavation, not zero excavation. If a proposal describes no digging at all, ask precisely where the access points are and what the surface above them looks like afterwards.
The second thing the phrase hides is eligibility. Industry reference material such as the NASSCO rehabilitation methods matrix exists because each method has documented capabilities and limits. Lining works with the pipe you have; bursting replaces it along the same path. Neither one re-routes a line, and neither one invents fall where the grade has been lost.
A trenchless recommendation is only as good as the survey behind it. The footage should show the run end to end with distances recorded, identify the pipe material and approximate diameter, show whether the pipe holds its shape, show standing water that might indicate a belly, and show the condition at joints and connections. Where a blockage stops the camera, the unexamined remainder is unknown — not assumed fine. Our inspection guide covers what a usable deliverable includes.
Trenchless work on the exterior lateral is still exterior sewer service line work. Citizens Energy Group’s guidance describes using a qualified contractor, permitting and inspection for that category, and the utility publishes a lateral lining process and fact sheet among its wastewater permits and forms. Requirements and fees change; check the current versions at the utility rather than accepting a figure from a proposal.
Ask where equipment stages, how it reaches the access points, what the pits mean for the driveway or lawn, and what the surface looks like when the crew leaves. Trenchless genuinely reduces restoration in many cases — that is the point of it — but reduced is not none, and the restoration standard belongs in the written scope like any other line item.
A method recommended before any inspection. A guaranteed lifespan quoted as a round number with no reference to your pipe’s condition. A percentage saving over digging, offered before the excavation scope was ever defined. Reluctance to hand over the footage. A scope that names the method but not the length, the access points, the reinstatement of connections, or the restoration.
None of those mean a contractor is dishonest. They mean the proposal is not yet specific enough to compare against anything, which is the actual problem.
Work through these before treating trenchless as a settled option.
Reviewed August 29, 2026
NASSCO
2025 pipeline rehabilitation methods matrixIndustry reference for what lining and pipe bursting can and cannot do.
Citizens Energy Group
Wastewater permits and formsCurrent permit application, sanitary standards and the lateral lining fact sheet. Fees and process can change.
Citizens Energy Group
Connecting a sewer service line — homeowner FAQQualified contractor, permit and inspection expectations for exterior sewer service line work.
Requirements and published guidance change. Confirm the current rule for your address with the responsible utility before authorizing work.
Only an inspection can answer that. Tell us what you have so far and we'll help you figure out what's still missing.
Indy Sewer Guide is an independent homeowner resource and does not perform sewer work. Submitted requests may be shared with an independent local professional when appropriate.