Leak detection and leak repair are two steps of the same job: detection confirms there is a leak and pinpoints exactly where it is, and repair fixes that spot. Doing them in that order keeps repairs small, because nobody has to open walls, floors or concrete to search. This article explains how the two fit together.
Why detection comes first
Water rarely shows up where the leak is. It runs along pipes, framing and slab surfaces before it appears as a stain or puddle. Repairing where the water appears, instead of where it is escaping, often means opening the wrong wall or replacing material while the real leak keeps running. Locating the source first saves time, material and repeat repairs.
What causes most leaks
- Aging and corroded pipes and fittings
- Worn seals, washers and cartridges in fixtures
- Loose or failed connections at valves, appliances and water heaters
- High water pressure that strains pipes and hoses
- Ground movement and settling that stress pipes under slabs and underground
How leaks are detected
- Confirm water loss with the water meter and, where needed, pressure testing.
- Isolate the leaking line or fixture by testing sections of the plumbing separately.
- Pinpoint the location with non-invasive tools such as acoustic listening equipment, thermal imaging and moisture meters.
For more on the methods, see important facts about leak detection.
How the repair is approached
Once the leak is marked, the repair can be planned around it: replacing a failed fitting or section of pipe, repairing a connection, or, where a line has failed in several places, rerouting or replacing it. When pipes keep leaking in different places, a plumbing repipe may be worth considering instead of repeated spot repairs.
Signs you need leak detection
- Water pooling with no obvious source
- A water bill that rises with no change in use
- Stains, bubbling paint, warped floors or warm spots on floors
- A musty smell or the sound of running water when nothing is on
The signs of a leak guide covers each one.
Getting it done
Frequently asked questions
Can a leak be repaired without finding it first?
Sometimes the source is obvious, such as a dripping trap under a sink. For anything hidden in a wall, ceiling, slab or underground, repairing without locating the leak usually means opening more than necessary and risks missing the real source.
Will walls or floors have to be opened?
Detection itself is non-invasive. Once the leak is pinpointed, the repair usually needs access only at that spot rather than exploratory openings.
How do I know if the leak is under my slab?
Warm spots on the floor, the sound of running water and a moving water meter with everything off are common clues. Slab leak detection confirms it.
1st Response Leak Detection locates leaks in homes and commercial properties across San Diego County and provides leak repair once the source is found. For hidden leaks, see mystery leak detection. Call (619) 374-8554 or request service.