Find available system information
If you have installation records, a site plan or details from a previous service, keep them to hand. If you do not know the tank type or size, say so when booking rather than guessing.
Explain access arrangements
Tell the supplier whether the tank is behind a gate, down a narrow lane, across a field or a long distance from a place where a tanker can park. Describe slopes, soft ground, overhead obstacles and any parking limits.
Make the work area accessible and safe
Only uncover or expose components if you can do so safely. Do not enter a tank or confined space. Keep people and pets away from open covers and equipment during the visit, and follow the supplier's instructions.
Ask what will happen during the visit
Confirm whether the job is emptying, inspection, routine servicing or a repair, and whether any follow-up work may be recommended. Ask for any service record, disposal information or maintenance advice available after the visit.
Do not ignore warning signs
Persistent foul smells, slow drainage, wet ground near a tank or sewage backing up may indicate a problem. Contact a suitable professional for advice rather than opening or attempting to repair a system yourself. If pollution is suspected, seek guidance from the relevant authority.
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