When this method is useful
The method can support bathroom and accessible waste-path investigations when suitable for the materials and circumstances. It is different from testing a pressurised hidden supply pipe.
What happens during the investigation
The engineer considers the route being tested and how a result could be observed. Controlled testing helps distinguish one possible source from another and records the findings in context.
What it cannot establish on its own
Not all surfaces, systems or situations are suitable for dye. Water may take time to travel, and a negative result does not prove that every possible pathway is sound.
How we combine the evidence
Visual inspection, borescope views and moisture mapping help identify the relevant pathway and interpret the result.
Good detection is a sequence of decisions. We use the observations to narrow the question, check whether the results agree and explain the practical implications before proposing access. This helps you understand the reason for the work rather than simply seeing a piece of equipment in use.
Preparing for the visit
Describe which fixture use precedes the leak. Mention sensitive finishes and recent sealing or waterproofing work before any controlled test.
The method is part of the service
The engineer selects suitable methods within the agreed investigation. Our £1,750 residential package also includes necessary access or excavation, the plumbing repair, parts, materials, appropriate retesting and an Written Trace & Access report. It is not a promise to use every listed technique at every property.
All our work within the agreed scope has a one-year workmanship warranty. Decorative and remedial reinstatement is excluded. Commercial work receives an individual quotation.
Documenting useful findings
Where a result supports the investigation, the report explains its relevance to the source, access or repair. Photographs are included where appropriate. The report can support an insurance submission, but your insurer determines eligibility and reimbursement under your policy.