4,550ltr Septic Tank



Septic tanks are a cost-effective solution for residential wastewater treatment and they’re a great option when you may not have access to municipal wastewater systems.

Polymaster septic tanks are approved in VIC, SA & NSW

This tank has a recommended application for a 6-10 people household.

Please check with your local council for exact local requirements.

These all new, ultra-strong, low profile septic tanks have passed the stringent test of AS/NZS 1546.1 certification with flying colours.

Outstanding features and benefits are:

  • 10 minute hook-up – fittings and baffle are pre-installed
  • One-piece tank with lifting lugs – lightweight and easy to handle.
  • Australian manufactured – offering you maximum support and service
  • Self-anchoring – does not require concrete
  • Low profile design – minimal excavation depth
  • Tested and certified to AS/NZS 1546.1:2008 – assurance of maximum performance
  • EPA approval BMP650823


  • Dimensions 3520L x 1640W x 1665H
  • Capacity 4,550 ltr

*Optional Riser Extension available 555mm W x 530mm H

What makes Polymaster tanks the toughest?

  • Self-supporting roof design means no support poles are necessary
  • Extra thick corrugated walls for maximum strength
  • Double strength UV+ resin ensures ultimate protection against Australia’s harsh sun
  • One-piece construction with no joins, seams or part-lines
  • Certification to AS/NZ4766 tank standard
  • 22 COLORBOND® colours
  • 20 Year Warranty for peace of mind! *conditions apply
  • Fast delivery of rainwater tanks – delivered within 21 days

Australian Made

Fast Delivery

Up To A 20 Year Warranty


10 minute hook-up

Fittings and baffle are pre-installed

Low profile design

Minimal excavation depth

easy to handle

One-piece tank with lifting lugs


Does not require concrete

To Order Your Accessories, Call Our Sales Team On 1800 062 064