How Do Septic Tanks Work?

A septic tank is a private sewage treatment system used by properties that aren't connected to the public mains sewer. The tank separates solid waste from liquid, allows natural bacterial breakdown of organic matter, and discharges treated effluent into a soakaway or drainage field. Regular maintenance is essential to keep the system working efficiently and legally compliant.

What to Look For

• Wastewater enters the tank and heavy solids settle to the bottom
• Lighter materials float to form a scum layer on top
• Bacteria naturally break down organic matter in the tank
• Partially treated liquid flows out to a soakaway or drainage field
• The tank needs emptying every 6–12 months to remove accumulated sludge
• General binding rules (2020) set minimum treatment standards

How We Diagnose the Problem

We inspect septic tank condition, check inlet and outlet pipes, assess the soakaway or drainage field performance, and test effluent quality. We identify whether the system meets current environmental regulations and recommend upgrades where needed.

How We Fix It

We provide septic tank emptying, repairs to damaged tanks and pipework, soakaway replacement, and upgrades to treatment plants where general binding rules require higher treatment standards. We help rural property owners maintain compliant private drainage.