Septic Systems & Absorption Trenches
Installed by Radar Plumbing – Sydney to the Central Coast & Greater Hunter Region
At Radar Plumbing, we specialise in the design and installation of septic systems and absorption trenches, delivering complete wastewater solutions from Sydney’s Northern Suburbs through to the Central Coast and the Greater Hunter. Whether you’re managing effluent from septic tanks or upgrading an existing treatment system, we create engineered, site-specific solutions that are reliable, low-maintenance, and built to last.
What is an Absorption Trench?
An absorption trench is an underground system that disperses and treats effluent from septic tanks or on-site wastewater treatment units. Effluent is filtered into the surrounding soil, where it naturally breaks down below the surface—keeping your property safe, hygienic, and compliant.
Finding the Right Absorption Method for Your Property
No two sites are the same, which is why we work closely with each client to determine the most effective absorption method. Factors such as soil type, site slope, and recommendations from a geotechnical report (often part of the Design and Assessment process) will guide the design. Our expertise ensures you get a system that works with your land—not against it.
Our Absorption Trench Systems
Gravity-Fed Absorption Trenches A simple, low-maintenance option for suitable slopes and soils. Slotted PVC pipes connect to a distribution box, spreading effluent evenly throughout the trench.
Pressurised Dosage Absorption Beds Ideal for difficult or flat sites, small or split areas, or where multiple trenches are required. These systems use pressurised PVC pipes with evenly spaced holes to distribute effluent like an underground sprinkler system.
Keeping Your System Efficient
The key to a long-lasting absorption trench is protecting it from excess water. We recommend stormwater diversion solutions to keep surface runoff away from the absorption area—preventing saturation and maximising system lifespan.
Perfect for Rural & Off-Grid Living
Absorption trench systems are especially suited to:
Rural properties
Acreage developments
Off-grid homes
Sites without main sewer connection
Once installed, they offer dependable, sustainable wastewater management with minimal upkeep.
Why Choose Radar Plumbing?
Specialists in absorption trench and septic system design
Decades of hands-on installation experience
Local knowledge across Sydney’s North, the Central Coast, and the Greater Hunter
Fully licensed and insured team
Complete support—from design to installation and long-term advice
Ready to Discuss Your Septic System or Absorption Trench?
Contact Tim Ireland
Radar Plumbing Group Pty Ltd
📞 0402 990 602
📍 Servicing Sydney’s North, the Central Coast & the Greater Hunter