01

What the service should include

The engineer combines accessible chambers, camera direction, signal location and property observations to build a usable route plan.

  • Confirm the affected system and access
  • Assess hazards and previous treatments
  • Explain the proposed method
  • Check the result before leaving
02

Questions, evidence and outcome

The deliverable should identify known access, route, depth where measured and any unverified section rather than implying false precision.

  • Which locating method will be used?
  • Will depth and route be marked or drawn?
  • Are uncertainties clearly recorded?
03

Step-by-step approach

  1. 1

    Describe every symptom

  2. 2

    Disclose products and previous work

  3. 3

    Agree scope and price basis

  4. 4

    Ask how the result will be verified

  5. 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.