Tracer Gas Leak Detection in Sandy, UT

Underground pipe cross-section with tracer gas visualization rising from a hidden leak point

Some leaks defeat every other method: too deep for clear acoustic readings, in plastic pipe that doesn't carry sound, or under conditions where thermal shows nothing. That's when we use tracer gas — the same principle utilities use to find gas leaks, adapted for water pipes. The line is drained and filled with a safe, non-flammable blend of nitrogen and hydrogen; the tiny hydrogen molecules escape through the leak, rise through soil or concrete, and a sensitive detector sniffs them out at the surface — directly above the break.

Warning signs

Leaks acoustic can't hearDeep burial, plastic pipe, or high ambient noise can all make acoustic readings unreliable. Tracer gas doesn't need sound — it follows the leak's physical path.

Multiple suspected zonesWhen pressure testing shows a leak but the zone is large, tracer gas narrows it decisively instead of requiring exploratory work.

Under-slab leaks with no thermal signatureCold-water leaks under slab in temperature-stable conditions can be invisible to thermal cameras and faint to acoustic gear. Gas finds them regardless.

Long underground runsFor extended service lines or irrigation mains, tracer gas can survey length efficiently where acoustic would take far longer.

When to call us

Tracer gas is typically a second-line method — we reach for it when acoustic and thermal have been tried or when conditions obviously favor it (deep plastic lines, for example). If a previous investigation failed to pinpoint your leak, tracer gas is often the method that finishes the job.

How we find it

Forming gas (95% nitrogen / 5% hydrogen)
The industry-standard blend: non-flammable (below the 5.7% hydrogen combustion threshold), non-toxic, and the hydrogen molecule is the smallest in existence — it escapes through leaks nothing else would reveal and dissipates harmlessly.

Line preparation
The suspect section is isolated, drained, and filled with the gas blend at low pressure — a careful, controlled procedure.

Surface detection
A hydrogen-sensitive detector sweeps the surface above the pipe path. The strongest reading marks the leak — simple in principle, precise in practice.

Pipe-path mapping first
As with acoustic work, the pipe's route is traced before gas goes in, so surface readings map to the real line.

Our process

1
Method selection
We confirm tracer gas is the right tool — usually after acoustic/thermal, or immediately when conditions dictate.
2
Isolate & prepare
The leaking section is isolated from the rest of the system and drained.
3
Charge with forming gas
The section is filled with the nitrogen-hydrogen blend at controlled low pressure.
4
Surface sweep
The detector follows the mapped pipe path; readings peak above the leak.
5
Mark & verify
The point is marked, and where possible cross-checked with a second reading before we call it located.

What to expect

Expect a more involved setup than acoustic work — isolation, draining, and charging take time — but a decisive result. The surface reading is unambiguous: the detector either smells hydrogen there or it doesn't. You'll see the peak reading yourself.

Honest limitations

Tracer gas needs an isolatable, drainable section — some system configurations make preparation impractical, and we'll tell you upfront if that's the case. Very porous ground can diffuse the gas broadly, widening the indicated area; in those conditions we narrow as far as honestly possible and say so. It's also a locating method, not a repair — excavation or access still follows.

Sandy & Utah context

Tracer gas is established in the Salt Lake Valley — local leak specialists describe the method on their Sandy-area pages (drain the pipe, fill with a safe inert nitrogen-hydrogen mix, detect where it surfaces), so it's a recognized, expected capability here, not an exotic import. It's particularly valuable in Sandy for the cases our housing stock produces: aging plastic service lines that defeat acoustic, and under-slab cold-water leaks that defeat thermal.

Is tracer gas safe for my home and family?

Yes. The standard blend is 95% nitrogen and 5% hydrogen — non-flammable, non-toxic, and the tiny amount of hydrogen dissipates into the air harmlessly. It's the same principle utilities use, adapted for water lines.

How does tracer gas find a water leak?

The pipe section is drained and filled with the gas blend. Hydrogen molecules are the smallest in existence, so they escape through the leak, rise through soil or concrete, and a sensitive detector finds them at the surface — directly above the break.

When is tracer gas better than acoustic detection?

For deep lines, plastic pipe (which carries sound poorly), noisy environments, or cold-water slab leaks with no thermal signature. It's often the method that succeeds where others couldn't.

Does tracer gas work on drain lines?

It's designed for pressurized supply lines that can be isolated and charged. Drain lines are better served by cameras, smoke testing, or hydrostatic testing.

Will the gas damage my pipes?

No. It's an inert blend at low pressure — no corrosion, no residue, no effect on water quality. The line is flushed and returned to service afterward.