Choosing a septic tank / liquid-waste service
Updated 9 August 2026
Septic and grease-trap pump-outs are regulated waste work: the operator must be licensed and dispose at a licensed facility, and you should get a docket proving it.
What to check
Confirm they're a licensed liquid-waste transporter and ask where the waste goes — a legitimate operator provides a disposal docket. Ask how often your system and household size actually needs pumping (commonly every 3–5 years for a domestic septic) rather than being upsold an annual job. For grease traps, confirm they can meet your council or water authority's pump-out schedule and paperwork.
Common questions
How often does a septic tank need pumping?
Typically every 3–5 years for a domestic system, depending on tank size and household. An operator who checks sludge levels can tell you accurately.
Do I get proof of disposal?
Yes — insist on a disposal docket. It shows the waste went to a licensed facility, which councils can ask you to produce.
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