Septic Tank Emptying

Most septic tanks need emptying at least every three to five years, depending on the size of the system and how many people are in the house. Over time, solids settle at the bottom and, if they’re not cleared, they’ll block pipes and overload the system. That’s when the smells, back-ups, and costly repairs kick in.

Keeping Canterbury homes running smoothly before the smells and back-ups kick in

Robsons takes care of it before it gets that far — quick pump-outs, the right gear for the job, and decades of know-how. Around Canterbury, we’re the crew homeowners call to keep septic tanks working the way they should.

The septic cleaning process

Septic tank cleaning requires more than just skimming the top layer of water. A healthy system requires the complete removal of the heavy sludge that accumulates at the bottom of the tank and the scum layer at the top.

We deploy powerful vacuum trucks to extract all liquid and solid waste, preventing those solids from flowing out into your drainage field and causing system failure.

Real-world uses

We manage septic systems for rural blocks, lifestyle properties, and residential homes across the Canterbury region.

Typical scenarios include:

• • Routine Maintenance: The standard 3-to-5-year pump-out to maintain system health and longevity.
  • Property Sales & Purchases: Emptying and checking tanks before buying or selling a home to ensure there are no hidden surprises.
  • Emergency Pump-Outs: Rapid response to gurgling drains, foul odours, toilets that won’t flush, or surface water pooling near the drainage field.
  • Event Preparation: Pumping out tanks before large gatherings, weddings, or hosting guests to prevent sudden system overloads.