The situation

Illustrative example. Not a real job or customer.

In a home where the lateral runs diagonally under a long concrete driveway to the street, drains have slowed and a sewer odor appears near the garage. A camera inspection shows longitudinal cracks along much of the run, but the pipe still holds its round shape and the slope is consistent.

  1. The plumber locates the line and confirms most of it sits under the driveway.
  2. Footage shows cracks, light roots and no sags or collapsed sections.
  3. The homeowner asks for written scopes for both lining and open trench.
  4. Both scopes describe restoration in detail.

With the driveway on top and a round, well-sloped pipe below, lining became the option most worth pursuing.

What each method would disturb

Lining

  • Access at the existing cleanout and possibly a small pit near the street
  • Driveway concrete stays in place
  • Old pipe remains as the host
  • Cracks and joints sealed along the lined length

Open trench

  • Saw-cut strip through the driveway
  • Concrete removed and later replaced or patched
  • New pipe with slope checked directly
  • Restoration may be a large part of the scope

How the lining might proceed

  1. Clean

    Roots and debris cleared so the liner can bond.

  2. Measure

    Length and diameter confirmed on camera.

  3. Install and cure

    Liner inserted from the cleanout and cured in place.

  4. Reconnect and record

    Ends finished and a final camera pass recorded for the homeowner.

What would have changed the answer

If the camera had shown a collapsed section or a long belly under the driveway, lining would not have fixed it. Digging at that one spot, or replacing the line by another method, would have entered the discussion despite the concrete.

Permit requirements for the work, including any connection near the street, were checked with the City of Whittier before scheduling.

Questions for your own driveway line

  1. Does any part of the line under the concrete have a sag or collapse?
  2. Where would access pits go?
  3. How will the liner end be sealed at the house and street?

Common questions

Is this a real project?

No. It is an invented example for explanation.

Is lining always the answer under concrete?

No. It depends on the pipe's shape and slope on camera.

Would a permit be needed?

Check with the City of Whittier for the specific scope.

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