What the service should include
The engineer should identify what the drain carries, control the contaminated area and clear from an access point that allows equipment to be recovered safely.
- Confirm the affected system and access
- Assess hazards and previous treatments
- Explain the proposed method
- Check the result before leaving
Questions, evidence and outcome
The downstream run and connected inlets should flow normally, with any structural concern explained and evidenced.
- Which access point will be used?
- Where will dislodged material be recovered?
- Is a camera check recommended after clearance?
Step-by-step approach
- 1
Describe every symptom
- 2
Disclose products and previous work
- 3
Agree scope and price basis
- 4
Ask how the result will be verified
- 5
Keep footage, reports and repair recommendations
Important safety point
Tell the engineer about every chemical or home treatment already used. Hidden corrosive liquid can put people at risk when a pipe or trap is opened.