Lead Water Mains Leak Detection in Guisborough

Symptoms

The external main cold water pipe serving the property was found to be old lead pipe, a material that requires urgent replacement under current standards regardless of condition. The visible water at the front of the property was the most obvious sign, but the actual leak point was concealed beneath the door frame between the kitchen and the corridor, making it far from straightforward to locate without specialist equipment.

A water mains leak detection investigation was necessary to pinpoint the precise source before any repair could be carried out.

Methods Used

With the pipework route established, pressure testing was repeated while acoustic listening was used to isolate the leak sound. The noise of escaping water was audible next to the door and the kitchen unit, narrowing the location precisely enough to begin targeted excavation.

This combination of thermal imaging, pressure testing, and acoustic detection is typical of a thorough water mains leak detection investigation where the leak is concealed beneath a finished floor and cannot be reached without careful preparation.

Investigation Process

1. 1
   Initial pressure test carried out

   Pressure testing was applied to both the external main cold water pipe and the internal cold water pipe. Pressure was lost very quickly in both cases, confirming a significant active leak.

2. 2
   Thermal imaging deployed

   Thermal imaging was used to map the pipework layout beneath the floor and identify anomalies. A thermal irregularity was detected in the corridor floor, focusing attention on the area near the door threshold.

3. 3
   Acoustic listening used to pinpoint leak

   With pressure reintroduced to the system, acoustic listening equipment was used to listen for the sound of the leak. The noise was clearly audible next to the door and the kitchen unit.

4. 4
   Floor excavated to access leak

   The wood floor and 100 mm of insulation were removed in the kitchen, followed by excavation of the concrete floor beneath to expose the pipework at the door frame.

5. 5
   Leak located and repair carried out

   The external main cold water pipe was found to be leaking beneath the door frame between the kitchen and the corridor. The old lead pipe was repaired using a lead pipe adapter and plastic pipe.

Result & Outcome

For a water mains leak detection case involving old lead pipework and elevated pressure, the findings here point to a broader infrastructure issue that the surface leak was only a symptom of. Addressing only the immediate repair without replacing the lead main or controlling the pressure leaves the property at ongoing risk of further failures. The recommendations provided give the customer a clear path to a long-term resolution.