Information to provide when booking
Describe what you can observe rather than only saying the drain is blocked. Name every fixture, whether water is rising, and whether the problem is inside or outside.
- Affected and unaffected fixtures
- Overflow, odour and gurgling
- Safe access and parking constraints
- Exact product names, doses and times
Information to request afterwards
Ask what was found, how clearance was verified and whether any proposed follow-up is based on camera or location evidence.
- Method and access used
- Material recovered
- Flow or CCTV verification
- Separate repair scope and evidence
Step-by-step approach
- 1
List symptoms
- 2
Photograph accessible areas safely
- 3
Keep product containers
- 4
Explain previous work and recurrence
- 5
Request a written scope and evidence
Important safety point
Always disclose chemical drain cleaners before the engineer opens a trap, inserts a tool or uses high-pressure equipment.