Ultrasonic leak detection on a listed facade
How Trace located the source without destructive opening-up and delivered a clear remediation plan.
Commercial roof moisture survey, Central London
How Trace located the source without destructive opening-up and delivered a clear remediation plan.
- UKAS accredited
Recognising the early signs
A swimming pool that needs topping up more often than usual is rarely evaporation. Pools lose water through failed liners, cracked shells, faulty fittings and leaking underground pipework — and each leaves a different signature. Spotting which one you're dealing with early saves both water and the cost of a bigger repair. This case shows how we traced a persistent loss to its exact source, non-destructively, and what the owner did to put it right.
troubleshoot
Our approach:
- check_smallBucket and dye tests to confirm a genuine leak, not evaporation.
- check_smallPressure testing of the plant and pipework circuits.
- check_smallTracer gas and acoustic detection to pinpoint the exact fault.
What we found
Bucket testing confirmed the pool was losing water well beyond normal evaporation. Isolating the circuits showed the shell and liner held pressure, but the return line did not — the loss was underground, on the plant-room side.
- Return-line pressure dropped steadily under test.
- Tracer gas surfaced at a buried joint near the plant room.
- Acoustic testing confirmed the exact break point.
- No damage to the pool structure or surround.
The outcome
With the fault located to a single buried joint, the repair was targeted and minimal — one small excavation rather than replacing the whole return line or breaking up the surround.
- A single 0.5m excavation, not a full dig-up.
- Pool back in service within two days.
- Documented report for the owner's insurer.
- Water loss stopped, verified by re-test.
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FAQs
A bucket test compares the water level inside a floating bucket with the pool level over 24–48 hours. If the pool drops faster than the bucket, you have a genuine leak rather than evaporation.
No. Our pressure, tracer-gas and acoustic methods work with the pool full, so there's no draining, refilling or chemical rebalancing to pay for.
Yes. Buried return and suction lines are the most common culprits. We pressure-test each circuit and use tracer gas to surface the exact break point before any excavation.
Rarely. Because we locate the fault to a single point, the repair is usually one small excavation rather than lifting the entire pool surround.
Yes. You receive a documented report with test results, imagery and a clear statement of cause and extent — the evidence insurers need to settle a claim.
Still have questions?
Tell us what's happening on site and we'll advise on the right test.
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