Two different problems, two different answers

Some sewer lines have one bad spot: a single cracked section, one offset joint near a tree, or a short break where someone once dug a post hole. The rest of the pipe may be in fair shape. In that case, repairing just the damaged length can solve the problem with far less disruption.

Other lines are wearing out end to end. A clay lateral with roots at joint after joint, or cast iron that is scaled and cracked in several places, will likely keep failing in new spots after any single fix. There, replacing or lining the whole run is often the more lasting answer. The hard part is the middle ground, which is where clear footage and good questions matter most.

Spot repair compared with full replacement

Spot repair

  • Fixes one section, usually by digging down to it or lining just that length
  • Less excavation and restoration
  • Leaves the rest of the original pipe in place
  • Makes sense when the rest of the line looks sound on camera
  • Other sections may still fail later

Full replacement or lining

  • Addresses the whole run from the house to the main connection
  • More planning, access and restoration work
  • Replaces or seals every joint and weak point at once
  • Makes sense when defects are spread along the line
  • Ends the cycle of chasing one failure after another

Reading the footage

  • IfOne defect, and the pipe on both sides looks round, clean and well joinedThenA spot repair is worth asking about.
  • IfTwo or three defects close together in one stretchThenAsk whether repairing that stretch as one section is practical.
  • IfRoot intrusion or cracks at many joints along the runThenFull replacement or lining is usually the better comparison.
  • IfA belly that holds water for a long distanceThenLining follows the existing slope, so ask whether re-laying that section is needed.
  • IfCollapse or a section the camera cannot passThenThat section needs excavation or bursting; ask what the rest looks like before deciding the scope.

Factors that tip the decision

Number of defects
One versus many along the run
Pipe material
Clay joints and corroded cast iron tend to fail again
Depth and access
A deep or hard-to-reach section raises the cost of repeated digging
What is above
Driveways, patios, slabs and trees affect which method is practical
Your plans
Selling soon, remodeling or staying long term all change the trade-off

Questions to ask before choosing

  1. How much of the line looks sound, and how much does not?
  2. If I do a spot repair now, which section is most likely to fail next?
  3. Would the spot repair connect new pipe to old pipe, and how is that joint made?
  4. Does either option require a City of Fullerton permit and inspection?
  5. Will you re-scope the line after the repair so I can see the result?

Common questions

Is a spot repair a temporary fix?

Not necessarily. Repairing a single damaged section can be a lasting fix if the rest of the pipe is sound. It is the rest of the line that determines how long it holds up.

Why would a contractor recommend full replacement?

Usually because the camera shows problems spread along the line. Ask them to show you each defect on the footage so you can see the reasoning.

Can part of a line be lined instead of dug up?

Often, yes. Sectional lining can seal one damaged length if the pipe there still holds its shape and the plumber can reach it.

General information for Fullerton, not a quote or professional advice. In an emergency, call 911.