Leak Detection & Repair — Los Angeles & the Valleys
Hidden Leak? We’ll Find It Fast — Without Tearing Up Your Home.
Non-invasive leak detection and repair from a licensed, family-owned LA plumber since 1997. Acoustic and electronic equipment pinpoints slab, wall, and underground leaks to the exact spot — so we fix only what needs fixing, with a written price up front.
Book an Appointment
Leak Detection — Confirmed Within 1 Hour
🔒No obligation. Confirmed within one hour. Never shared.
Signs you have a hidden leak
Water bill jumped with no change in usage
Warm spot on the floor (hot-water slab leak)
Sound of running water when everything’s off
Damp spots, mold smell, or peeling paint on walls/floors
Water meter spinning with all fixtures off
Soggy patch in the yard over the water line
Don’t jackhammer blind — we pinpoint it first.
Why LA homes spring hidden leaks
Two things make hidden leaks common across LA. First, age: much of the housing — Pasadena, San Marino, South Pasadena, the older Valley tracts — still runs on galvanized supply lines that corrode from the inside and eventually pinhole. Second, slabs and soil: mid-century homes on concrete slabs are prone to slab leaks where copper lines under the foundation wear through, and the region’s ground movement stresses buried pipe.
The wrong move is to start opening walls or breaking concrete to “go find it.” We do the opposite: acoustic and electronic detection locates the leak to the exact point first, so the repair is small and targeted — and if we find widespread galvanized corrosion, we’ll tell you honestly whether a spot repair or a repipe is the smarter long-term call. Since 1997.
What we find and fix
Slab leaks
Hot/cold lines under the foundation. See slab leak repair.
Wall & ceiling leaks
Supply and drain lines
Underground / yard-line leaks
Water service lines
Fixtures & connection leaks
Traced to source
The repair
Targeted fix, or repipe if corrosion is widespread
Call us today
Get the leak located and repaired before it causes more damage.
Why LA chooses Advantage Plumbing & Rooter
24/7 real people
Written prices up front
Licensed CA #1067555
Family-owned since 1997
Pinpoint detection (minimal damage)
Workmanship guarantee
How it works
Call/request online
Confirmed within one hour.
We pinpoint the leak
Acoustic/electronic detection, no guesswork.
We fix it right
Targeted repair (or an honest repipe recommendation) — guaranteed.
The cost of leak detection and repair
Leak detection is typically a modest flat rate (~$200–$500) depending on access and method; the repair is quoted in writing once we’ve pinpointed the source. If detection reveals widespread galvanized corrosion, we’ll show you the trade-off between spot repairs and a repipe. You approve before we start.
Rated 5.0 ★ across 300+ reviews
Frequently asked questions
Find That Hidden Leak Today — Confirmed in 1 Hour
Book an Appointment
Leak Detection — Confirmed Within 1 Hour
🔒 No obligation. Confirmed within one hour. Never shared.
