Using thermal imaging, acoustic surveys, and tracer gas testing, our specialists locate hidden leaks in schools, hospitals, offices, and industrial sites fast — without disrupting live operations.
Commercial leaks rarely announce themselves. They show up as an unexplained spike in the water bill, a damp patch on a ceiling tile, or a facilities team chasing a mains pressure drop with no visible cause. By the time water is visible, it may already be disrupting operations or damaging stock, fabric, or finishes.
That’s why we use specialist detection equipment first. Thermal imaging, acoustic technology, and tracer gas help pinpoint leaks with minimal disruption to a live site. Once the source is confirmed, we document the problem, recommend the remediation, and provide a report suitable for insurance and loss adjuster claims.
Every survey is confirmed in writing before any work starts — no call-out fee, no parking or ULEZ surcharges, no surprises on the invoice. All work is backed by an 18-month workmanship guarantee.
Every job follows the same process, in the same order. We don’t guess, and we don’t open anything up until we’re certain. Here’s the equipment behind every investigation.
A mains system or pipework circuit losing pressure with nothing visibly wrong is often the first clue. We isolate the circuit, bring it up to a controlled test pressure, and narrow down the fault area.
Water moving behind a wall, under a floor, or through a roof void changes the surface temperature just enough for an infrared camera to pick it up — no tiles lifted, no plaster opened.
A soft patch of flooring, a recurring stain, a ceiling mark with no roof leak to explain it. Moisture readings tell us how far it's spread and point us toward the source.
Escaping water under pressure has its own sound signature. Ground mics and pipe-correlation equipment pick it up, even underground or behind finished walls — ideal for large sites and buried mains.
Electronic correlators placed at two access points analyse vibration patterns to calculate the precise location of a buried leak, reducing excavation to the exact area required.
For leaks that won't show up any other way, a safe hydrogen-nitrogen mix is fed into the system and followed with sensitive detectors until it reaches the exact point of escape. Our most precise method, reserved for the hardest cases.
Every survey is confirmed in writing before work starts. No call-out fee. No hidden charges.
Charged in 30-minute increments 1h after arrival. No call-out fee. From £140 +VAT for the first hour.
Discounted rates for facilities managers, multi-site operators, and managing agents with multiple properties. Dedicated account manager included.
No hidden extras: no parking, fuel, ULEZ, or Congestion Charge surcharges. Materials at trade cost plus 30% markup, fully itemised on the invoice. Account-client portfolios receive discounted rates from the published prices.
Real engineers, real qualifications — the same trusted faces who’ll be on-site, not a subcontractor you’ve never met.
John Mayer | 9+ Years Experience
Gas Safe Registered NVQ Level 3 Plumbing & Heating ACS CCN1 & CENWAT Qualified G3 Unvented Hot Water Certified
John Mayer | 9+ Years Experience
Gas Safe Registered NVQ Level 3 Plumbing & Heating ACS CCN1 & CENWAT Qualified G3 Unvented Hot Water Certified
Arron H | 15+ years experience
Gas Safe Registered NVQ Level 2 Fully Qualified Plumber
JAMES MCLEAN | 17+ YEARS EXPERIENCE
NVQ LEVEL 2 PLUMBING THERMAL IMAGING CERTIFIED ACOUSTIC & TRACER GAS LEAK DETECTION TRACE & ACCESS REPORTING SPECIALIST
Arber J | 25+ Years Experience
NVQ Level 2 & 3 Fully Qualified Electrician Inspection & Testing Qualified PAT Testing Qualified
AUREL DARA | 15+ YEARS EXPERIENCE
NVQ LEVEL 3 PLUMBING & HEATING QUALIFIED SINCE 2011 LUXURY BATHROOM INSTALLATION SPECIALIST WRAS APPROVED PLUMBER
Chris V | 12+ Years Experience
NVQ Level 2 Drainage Construction CSCS Card OS19X CCTV Drainage Survey Qualified
One accredited team serving homeowners, landlords, and commercial clients across London and the home counties.
On call around the clock for leak detection, plumbing, heating, electrical, and drainage emergencies.
On call around the clock for emergencies. For planned work and quotes, we typically respond within the hour during business hours.
0208 108 0400
0757 700 2864
info@primefixgroup.uk
Monday to Friday 8am to 6pm | Emergency Line 24/7
Leave your details and a PrimeFix engineer will be in touch within 60 minutes.
Common questions about water leak detection, answered plainly. If you don't see what you're looking for, call us on 02081080400 and we'll talk you through it.
Call-outs are charged hourly — £140 +VAT for the first hour, then £70 +VAT per half-hour after that. There’s no call-out fee, and multi-site or portfolio clients receive discounted rates with a dedicated account manager. You’ll get a confirmed price before any work starts.
Yes. Thermal imaging, acoustic tracing, moisture mapping and tracer gas let us narrow down the source without shutting down operational areas. We can also work out-of-hours and at weekends to avoid disrupting business as usual.
Always. Every survey ends with a full digital report covering the leak source, the methods used, and our findings — written to a standard accepted by every major UK insurer and loss adjuster handling trace and access claims.
Yes — we offer dedicated account management, discounted portfolio pricing, and a single point of contact for landlords, managing agents, and facilities teams managing multiple properties.
Both. We run a 24/7 emergency line, 365 days a year, with no out-of-hours surcharge. For planned surveys or proactive maintenance checks, we’re just as happy to book a slot that suits your schedule.
Yes — every engineer holds relevant qualifications (NVQ Level 2/3, Gas Safe registration, NICEIC approval where required), and PrimeFix itself is CHAS accredited and SafeContractor approved.
Yes, we run a 24/7 emergency line, 365 days a year, with no out-of-hours surcharge.
