The situation
Illustrative example. Not a real job or customer.
Water seeps from an expansion joint in a concrete driveway. The meter sits near the curb on one side of the driveway and the house shutoff is on the other, so the service line crosses beneath the concrete.
- Meter test with the house valve closed shows continued flow
- Leak location narrows the leak to a spot under the middle of the driveway
- The line is older copper with signs of pitting where exposed at the house
The homeowner needs to choose how to get past the concrete.
Three options in this example
| Option | What happens | Main trade-off |
|---|---|---|
| Cut the driveway and repair | Saw-cut a section, fix the leak, re-pour concrete | Patched concrete; the rest of the old line stays |
| Trenchless replacement on the same path | Small pits at each end; new line pulled or bored under the driveway | Needs a suitable route and soil |
| New route around the driveway | New line laid through lawn along the side of the driveway | Longer run, but no concrete work; old line abandoned |
How the choice might be made
- IfThe rest of the copper looked soundThenA cut-and-repair could have been reasonable.
- IfThe copper shows pitting, as in this exampleThenReplacing the whole run makes more sense than patching under concrete.
- IfA clear lawn path exists beside the drivewayThenRerouting avoids concrete work entirely.
- IfNo clear path, but the soil suits boringThenTrenchless under the driveway is a strong option.
What happens in this example
- Compare written quotes.The homeowner asks two licensed contractors to price both the trenchless and reroute options.
- Choose the reroute.A lawn path along the side yard is available, so the new line goes around the concrete.
- Install and test.After 811 marking and any required permit, the new line is installed, connected and tested.
- Abandon the old line.The old line is capped at both ends and left under the driveway.
Takeaway
Concrete over a water line changes the economics of a repair. In this invented case, asking for more than one approach in writing showed that the longest route was the least disruptive one.
Common questions
Is this a real project?
No. It is an invented example.
Does the old pipe have to be removed?
Not always. Abandoned lines are often capped and left in place. The written scope should say which.
Which option is cheapest?
It depends entirely on the property. This site does not quote prices; compare detailed written quotes.
General information for Fullerton, not a quote or professional advice. In an emergency, call 911.