Find the Leak Before It Finds Your Foundation
The most expensive leaks are the ones you can't see. A pinhole in a pressurized line behind drywall, or a cracked pipe running under your slab, can leak for months — quietly soaking framing, feeding mold, and driving your water bill up — before a stain or a warm floor finally gives it away. By then the damage is done.
GB Plumbing finds those hidden leaks without guesswork and without demolition. Using electronic acoustic sensors, thermal imaging cameras, and pressure testing, we locate the exact source before opening anything. That means a small, targeted repair instead of tearing out walls or floors chasing a leak. Call (415) 738-1450 and we'll get to the bottom of it.
Whether it's a slab leak under the living room, a line inside a wall, or an underground supply line in the yard, precise location is everything. Pinpoint it first, and the repair is fast, clean, and far cheaper than the alternative.
"Our water bill doubled and we had no idea why — nothing looked wet. GB came out with acoustic gear and thermal cameras, found a slab leak under the hallway within an hour, and marked the exact spot. The repair opening was tiny. Without that equipment we'd have jackhammered half the floor guessing."
— San Mateo homeowner, Baywood ★★★★★
Leaks We Locate
Signs You May Have a Hidden Leak
Your Water Bill Jumped
A bill that climbs with no change in habits is the classic red flag. So is a water meter that keeps ticking over after every fixture is shut off. Both mean water is escaping somewhere you can't see — and it's worth locating before the waste and damage grow.
Warm Floors & Low Pressure
An unexplained warm spot on the floor often marks a hot-water slab leak below. A general drop in water pressure can mean a supply line is losing water before it reaches your fixtures. Both point to a hidden leak that electronic detection can pinpoint.
Mildew, Stains & Sounds
A musty or mildew smell, discoloration creeping across a wall or ceiling, or the faint sound of running water when the house is quiet all suggest water is collecting out of sight. We trace it to the source before it becomes a mold or structural problem.
"We kept smelling mildew in the guest room but couldn't see a thing. GB used a thermal camera and acoustic listening to trace it to a slow leak inside the wall. They marked it precisely, made one small cut, and fixed it. No exploratory demolition. Honest, careful, and clearly experienced."
— Burlingame homeowner, Burlingame Terrace ★★★★★
Our Detection Process
Confirm & Isolate the Leak
We start with a pressure test and meter check to confirm you have an active leak and narrow it to the supply side, a specific line, or a fixture — so we search the right place instead of the whole house.
Listen & Scan
Acoustic sensors detect the sound of water escaping a pressurized line, while thermal imaging reveals the temperature signature of hot-water leaks hidden behind walls, under floors, or beneath the slab.
Pinpoint & Mark
We converge the readings to mark the exact location of the leak. Precise location keeps any access opening as small as possible and turns a demolition project into a targeted repair.
Report & Recommend
You get a clear explanation of what and where the leak is, along with your repair options and upfront pricing. From there we can make the repair or coordinate the right next step.
Why Early Detection Saves You Money
Every hour a hidden leak runs, it wastes water you're paying for and pushes moisture deeper into framing, flooring, and foundations. A leak caught early is a small, precise repair. The same leak ignored for months becomes rotted subfloor, mold remediation, and — with a slab leak — potential foundation issues. Non-invasive detection isn't just about finding the leak; it's about keeping the fix small and stopping the meter from running.
Stop the Leak Before It Costs You More
A hidden leak wastes water and damages your home every day it runs. GB Plumbing pinpoints it with acoustic, thermal, and pressure tools — no guesswork, no needless demolition. Call for a precise diagnosis.
(415) 738-1450 — Call Now