ED Plumbing — Toronto & GTA plumbers
Emergency Call

Non-Invasive Leak Detection in Toronto & GTA — We Find It Before You See the Damage

A hidden leak can destroy tens of thousands of dollars of drywall, flooring, and structural wood before it ever shows a stain on your ceiling. We use acoustic sonar, thermal imaging, and pressure testing to pinpoint your leak precisely — with minimal cutting and no guesswork.

Schedule Leak Detection Today \n \n ED Plumbing technician using thermal imaging camera to locate a hidden water leak in a Toronto home wall\n
🔊
Acoustic SonarListens for leaks through concrete slabs
🌡️
Thermal ImagingSees moisture through walls & ceilings
🔬
Pressure TestingPinpoints which line segment is failing
🏠
Minimal DisruptionWe open only what we need to

What a Hidden Leak Does to Your Home Over Time

Week 1–4Water soaks into wall cavities. No visible signs yet. Mould spores begin colonizing wet wood.
Month 1–3Paint bubbles. Drywall softens. Subfloor begins absorbing moisture. Water bill creeps up.
Month 3–6Ceiling stains appear. Mould visible behind baseboards. Structural wood studs begin to rot. Repair cost: $5,000–$30,000+.

Our Leak Detection Technology

🔊

Acoustic Listening & Correlation

Water escaping under pressure produces a specific acoustic signature. Our ultra-sensitive ground microphones and acoustic correlators detect this signal through concrete slabs, tile, and packed soil. This allows us to pinpoint underground and slab leaks without any excavation — accurate to within centimetres.

🌡️

Infrared Thermal Imaging

Wet materials hold temperature differently than dry ones. Our high-resolution infrared cameras scan walls, ceilings, and floors — displaying a thermal map that shows moisture accumulation as a clear colour difference. We can identify a hidden leak behind a full wall in seconds, without cutting a single piece of drywall.

📊

Pressure Isolation Testing

By isolating sections of your supply system and monitoring pressure decay over time, we identify which branch or segment of your plumbing is leaking — even when acoustic and thermal methods can't reach the area (deep under a slab or in a finished wall cavity with insulation).

Leak Scenarios We Detect & Repair

Slab Leaks

Pipes running through or beneath your home's concrete foundation are among the hardest to find and the most expensive if missed. We locate slab leaks precisely using acoustic correlators, then perform targeted slab opens or pipe bypass reroutes — not exploratory jackhammering.

Hidden Drywall & Ceiling Leaks

Pinhole leaks in copper supply lines, failed compression fittings, and cracked solder joints can drip inside walls for months. Our thermal imaging finds the exact moisture location, so we cut a single access panel rather than tearing out a full wall section.

Underground Supply Line Leaks

A leaking underground service line between the street and your home causes your water meter to spin even when everything indoors is shut off. We locate these using acoustic methods without destroying your landscaping, then repair or replace the damaged section.

Irrigation & Outdoor Line Leaks

Outdoor irrigation systems, hose bibs, and buried lines are particularly prone to freeze-thaw damage in Toronto's climate. We detect these using pressure testing and acoustic methods, then repair or cap the affected zone.

High Water Bill Investigations

If your water bill has spiked with no obvious explanation — no new fixtures, no extra usage — a hidden leak is almost always the cause. We perform a systematic pressure and acoustic survey to find it and stop the metered loss.

Post-Detection Repair

We don't just find the leak and leave you with a report. We carry repair materials and can fix the identified section in the same visit — pipe section replacement, fitting repair, pipe bypass — with a 1-year warranty on the repair.

Why Choose ED Plumbing for Leak Detection

Frequently Asked Questions

How do I know if I have a hidden leak?
The most reliable early indicator is a water bill that's higher than normal with no change in usage. Other signs: sound of running water when everything is off; soft, spongy, or warped flooring near plumbing; musty smell in walls or under vanities; paint bubbling or peeling on walls near plumbing. The water meter test: turn off all fixtures and check if the meter is still spinning — if it is, you have an active leak somewhere.
Does leak detection require opening my walls?
Usually no — not at the detection stage. Our thermal and acoustic equipment locates the leak from the surface. Only once we know the precise location do we open the wall, and then only a small, targeted access panel. For slab leaks, we open the concrete only at the confirmed leak location — not exploratory jackhammering across the floor.
Can you detect a slab leak without destroying my floor?
Yes. Acoustic correlators can locate a slab leak to within 10–30 cm accuracy through the concrete. Once we have the location confirmed, we open the smallest possible area — typically 30–60 cm square — to access the pipe for repair. We can also sometimes reroute the pipe through the wall cavity rather than cutting the slab at all, depending on the pipe type and layout.
How much does leak detection cost in Toronto?
We charge a flat diagnostic fee for the detection visit, which covers the full assessment. If we find the leak and you approve the repair in the same visit, the diagnostic fee is credited toward the repair cost. Call us for the current service rate — it varies by the scope of detection required.

Request a Free Estimate

Licensed plumbers available 24/7. We respond to every request within 45 minutes.

  • No hidden fees — upfront pricing guaranteed
  • Licensed & insured master plumbers
  • 45-minute emergency response across the GTA
  • 1-year warranty on all work

Get a Free Estimate

We will reach out within 15-30 minutes to confirm dispatch.

Emergency? Call (437) 260-6342

Thank you! We will reach out within 45 minutes. For urgent issues, call (437) 260-6342.

High Water Bill? Spongy Floors? Mystery Stains? Let's Find It.

Every day a hidden leak runs undetected adds more damage. We offer same-day leak detection across the GTA.

Call (437) 260-6342

Related Plumbing Guides

Practical advice from our licensed Toronto plumbers.

Guide8 Signs of a Hidden Water Leak GuideWhy Is My Water Bill So High?

Areas We Serve

ED Plumbing serves Toronto and the Greater Toronto Area. Call (437) 260-6342 any time.

Toronto • North York • Scarborough • Etobicoke • Mississauga • Brampton • Markham • Richmond Hill • Vaughan • Oakville • Mississauga • Ajax • Pickering • Whitby • Oshawa