Information to supply
Have the tank size if known, household occupancy, previous pumping date and relevant service reports available. Tell the provider about changes in use, such as additional occupants, without guessing at system capacity.
Avoid calendar-only decisions
Ask what the previous service found and whether those findings support the suggested timing. Alternative systems and mechanical components can have maintenance requirements beyond ordinary tank pumping.
Document the recommendation
Request a written next-service recommendation and a record of any separate inspection or component maintenance. Keep notes of changes in occupancy or water use so the plan can be revisited when circumstances change.
Before booking
If you have active symptoms, describe them separately; an ordinary maintenance schedule is not a reason to defer investigation of a current problem.