3200L Deep Invert Septic Tank

Product Code

000845 – 3200L Deep Invert Septic Tank
000844 - 3200L Deep Invert Septic Tank with Baffles

Meets the needs of three to four bedroom homes. RELN's 3200L Deep Invert Septic and Holding Tanks are ideal for projects that require greater fall from the sewer exit point at the house to the septic tank. The tanks are fitted with RELN's innovative reinforced structural brace ring.  A baffle is included in the kit if required by state health department regulations.

The tanks are robust yet easy to handle and light, weighing in at just 159kg or 177kg with the baffle.


  • Australian Standards Approved - AS/NZS1546.1:2008 On-site domestic wastewater treatment units –Septic tanks Lic SMK1651
  • Easy to Transport – Lightweight and easy to manage without a crane. Riser kits are packed and stored inside the tank for delivery.
  • Strength by Design – RELN tanks feature a unique stepped ribbing for added strength
  • Anti Crush - Fitted with an innovative reinforced polypropylene structural brace ring that adds even greater rigidity to prevent crushing when installed deep in the ground.
  • Greater Flexibility - An innovative system designed for sites that lack the necessary fall from the sewer exit point at the house to the septic tank.  Offering more flexibility than any other septic system on the market.
  • UV protected grey lid reduces effect of sunlight
  • Built in locking alignment prevents incorrect fitting of lid to base
  • Complete Kit – RELN Septic Tanks are supplied as a complete kit including inlet and outlet T-Junctions.
  • 15 Year Warranty


  • Overall tank height: 2410mm
  • Liquid depth level: 1427mm
  • Overall diameter: 1998mm
  • Weight: 159kg
  • Weight including baffle: 177kg
  • Tank base to ground level depth: 2272mm
  • Capacity: 3200L

RELN’S 3200L Septic Tank includes

  • 3200L Septic Tank with reinforced structural brace ring installed
  • Baffle – supplied if required by state health department regulations
  • Standard Septic Tank Installation Kit
  • 4 x riser panel segments
  • 28 x M8 316SS nuts, bolts and washers for riser fastening

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