Swimming Pool Leak Detection in Leicester

Symptoms

The pool had a known skimmer line issue that had been acoustically located on the previous visit but not yet excavated. Alongside this, the manifold valves had been identified as faulty and required replumbing due to how they had originally been installed.

Both problems needed resolving before the pool could be returned to normal operation.

Methods Used

With the leak position confirmed by both pressure testing and acoustic correlation, permission was obtained to excavate. The slab was cut and the concrete broken up and cleared.

This uncovered a leaking union fitting on the skimmer pot. Once repaired, engineers re-dived the pool to check all remaining outlets including the pool lights, and no further issues were found.

This systematic approach — isolating each line, testing under pressure, then applying acoustic correlation — is the standard method used in swimming pool leak detection to pinpoint subsurface faults before any ground is broken.

Investigation Process

1. 1
   System Isolation

   On arrival the filtration system was switched off and made safe before any pool access began.

2. 2
   Pool Entry and Outlet Bunging

   Engineers removed the pool cover, dived the pool, and bunged all outlets — the skimmer, two returns, and the sump — to allow individual line testing.

3. 3
   Pressure Testing — Returns and Sump

   The two return lines and the sump were each pressure tested at 1.0 bar for 15 minutes; both held pressure with no loss recorded.

4. 4
   Pressure Testing — Skimmer Line

   The skimmer line was tested under the same conditions and showed the same pressure loss as the previous visit, confirming the fault was still present and isolated to this circuit.

5. 5
   Acoustic Survey

   An acoustic survey was carried out over the skimmer line, identifying the same anomaly in the same location as previously recorded.

6. 6
   Excavation

   With permission confirmed, the slab was cut and the concrete broken up and removed to expose the area beneath.

7. 7
   Leak Located and Repaired

   Excavation uncovered a leaking union fitting on the skimmer pot; the union was removed and the line retested to confirm no further leaks were present before a new union end was fitted in place.

8. 8
   Manifold Replumbed

   The old faulty valves on the manifold were removed and the pipework was replumbed with new valves and fittings back to the pump.

9. 9
   Post-Repair Dive and Final Check

   Engineers re-dived the pool and checked all outlets including the pool lights; no further issues were identified.

Result & Outcome

For any property in LE6 dealing with an unexplained pool water loss, this job illustrates how structured swimming pool leak detection — isolating lines, pressure testing, and applying acoustic methods before excavating — avoids unnecessary groundwork and targets the repair precisely. A recommendation was also made to relocate the pump to the other side of the filter, extend the manifold run, and fit a larger pump to address the low pressure the system was showing.