The situation
Illustrative example. Not a real job or customer.
A family in a 1960s-style slab home in Golden Hills notices that one patch of kitchen tile feels warm under bare feet. The water heater seems to run more often than usual. Nothing is visibly wet.
- They run a meter test with everything off; the leak indicator turns steadily.
- Closing the main at the house stops it, so the loss is inside.
- Toilet dye tests show nothing.
- Closing the water heater's cold inlet stops the meter, pointing to the hot side.
With a hot-side leak likely under the slab, they keep the water heater inlet closed when not needed and call a licensed plumber for leak location.
Locating the leak in this example
- Confirm with isolation.The plumber repeats the hot and cold isolation and pressure tests.
- Trace the hot line route.From the heater toward the kitchen, using knowledge of how lines are typically run.
- Listen and image.Listening equipment and a thermal camera narrow the warm area to a short stretch.
- Mark the floor.The suspected spot is marked before any decision about opening the floor.
The choice the family faces
Open the floor at the leak
- Tile and concrete removed at the marked spot
- Pipe repaired in place
- Tile matching may be difficult
- Rest of the old hot line stays under the slab
Reroute the hot line overhead
- New line run through the attic and down a wall
- Floor stays intact
- Drywall openings to patch
- Old under-slab section abandoned
What they choose and why
In this invented example, the kitchen tile is no longer made, and the house has had no previous leaks. The family weighs the risk of more leaks on the same age of pipe against the disruption of each option and chooses the reroute, with the plumber confirming in writing who patches the drywall.
They also ask their insurer about coverage before work starts, keeping photos and the plumber's written findings.
Questions to take from this example
- Do I know whether my supply lines run under the slab?
- How would I tell a hot-side leak from a cold-side one?
- Who would restore floors or walls after a repair?
Common questions
Is this based on a real house?
No. It is an invented example.
Is rerouting always better than a spot repair?
No. It depends on the pipe's condition, the flooring, access and whether there have been other leaks.
Why close the water heater inlet while waiting?
On a hot-side leak, closing the cold inlet to the heater stops water feeding the leaking line, limiting damage until the repair.
General information for Golden Hills, not a quote or professional advice. In an emergency, call 911.