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Our Range

Below Ground Water Storage Tanks – Polyethylene

Allied Pumps’ Polyethylene Underground Retention Tanks are tough, versatile liquid storage systems that have a standard capacity range from 5,000 litres up to 30,000 litres (larger on request). They can be connected in series to give larger storage capabilities – and therefore the combinations are limitless.

These innovative and robust storage systems are made from low density polyethylene and are ideal for applications that require excellent chemical resistance, stiffness, toughness and resistance to extreme Australian outdoor conditions.


  • Fully tested polyethylene tank designed to withstand ground and water pressure at depth
  • Complies and exceeds AS 1546.1 for septic tanks
  • Designed to AS 4766 (int.) for water storage tanks
  • Sealed locking tamper-proof lid – withstands 5kN load
  • Standard filter option available for cleaning water reducing frequency of opening tank for general maintenance
  • Stainless steel submersible pump with automatic mains water changeover device (optional)


  • Residential
  • Industrial
  • Council recreation
  • Playing fields
  • Hotels
  • Mine sites
  • Golf courses
  • Nursery irrigation
  • Townhouses
  • Park irrigation
  • Retirement villages
  • Truck stops
  • Sewage treatment
  • Commercial
  • Waste stations
  • Water retention

Contact the Allied Pumps Team

Contact us to learn about how we can help you with your pump needs.