Where’s the job?

Overview

• Drainage investigation specialists assess and diagnose issues such as blockages, leaks and faults in drainage systems.

• Skill level: 4 / 5 (requires technical expertise, specialised equipment and sound knowledge of drainage systems).

• Typical duration: 1 – 3 days depending on system complexity and site accessibility.

Safety First

• Isolate water supplies where necessary and secure the work area to prevent contamination.

• Wear suitable PPE including gloves, protective boots and eye protection.

• Be aware of hazardous gases such as methane or hydrogen sulphide – ensure proper ventilation.

• Avoid contact with contaminated water and sediments.

• Follow local regulations when disposing of any waste or hazardous substances.

Tools & Materials

Step-by-Step

1. Collect site information and review existing drainage maps or records.

2. Inspect accessible manholes and external drainage outlets for signs of damage or blockage.

3. Deploy CCTV cameras through the drainage system to capture internal pipe conditions.

4. Use smoke testing or pressure-testing if necessary to confirm potential leaks.

5. Analyse gathered footage and data to identify blockages, pipe damage, or infiltration issues.

6. Prepare a detailed report with images, findings and recommended remedial actions.

7. Review the report with the client and finalise documentation for any repair work.

Completion Checks

• The inspection report is comprehensive and includes clear visual evidence.

• All identified issues, blockages, and leak sources are documented.

• Client has been briefed and approval has been received for remedial work.

• Site safety is re-inspected and all hazards have been mitigated post-survey.

When to Call a Pro Instead

For complex drainage failures involving extensive pipework, contaminated sites, or where statutory approval is required, hiring a licensed drainage engineer ensures compliance, efficiency and peace of mind.