Bring the history of the drainage problem
List the fixtures affected, how often the problem occurs and when it first appeared. Include previous clearing work or repair dates if known. A recurring issue after an earlier intervention is useful context, but it does not establish the cause of the new problem.
If an earlier recording or report exists, have it available with the property address and inspection date. For a purchase-related enquiry, state the decision you need the inspection to inform and the access arranged with the owner.
Clarify access and the inspection boundary
Ask which section of the drainage system is proposed for inspection and how access will be obtained. Describe known access points without opening or dismantling anything for the enquiry. Also mention restricted rooms, finished surfaces and building-management requirements.
An inspection proposal should explain its intended scope and any conditions that could limit it. Confirm whether additional access or clearing would be quoted separately if the planned inspection cannot proceed as expected.
Ask how the findings will be explained
Before the appointment, ask what record is included: a written explanation, images, a recording or another agreed format. Ask that any proposed repair be linked to a specific finding and location rather than inferred from a generic description.
Keep an inspection finding separate from a repair authorization. If further work is suggested, request its purpose, alternatives and scope. The broader camera-service page explains the service; this page focuses on preparation and useful questions about the resulting record.