RELN Septic Tanks


Septic Tanks provide an onsite sewage disposal system for homes in rural or remote locations. Effluent flows from the toilet, bathroom, laundry, and kitchen into a tank, where liquids, fats, oils, and solids are separated. Bacteria in the septic tank consumes the effluent and leaves behind a liquid which flows on to an evapo-transpiration field. The liquid is evaporated by wind and sun or transpired through plants. 


Holding tanks (also referred to as collection wells or pump out tanks) are used to hold effluent when it cannot be disposed of in an evapo-transpiration field. These tanks collect effluent that overflows from a septic tank and store it for pump out by an effluent tanker and safe disposal at a town sewerage works. Holding tanks must be maintained at 1/2 capacity to prevent flotation. 


To do

RELN Septic Tanks

Installation Instructions.

RELN Septic Tanks and Holding Tanks must be installed by a licensed plumber, in accordance with instructions below and local authority requirements.

RELN Septic Tanks and Holding Tanks are supplied with inlet and outlet holes drilled to the meet the specifications of the installation location.

RELN Septic Tanks and Holding Tanks meet Australian Standard AS/NZS1546.1:2008 on-site domestic wastewater treatment units – Septic tanks. Lic

Approvals and additional information on septic tank operation and maintenance is available at www.reln.com.au


Polymaster Septic and Gray Water Tanks.

These tanks are also easy to install with minimal excavation thanks to the low-profile, self-anchoring design.


These tanks have passed the stringent test of AS/NZS 1546.1 certification with flying colours.


Discover high-quality septic tanks at Polymaster, designed to meet Australian standards and built for durability.


Our septic solutions offer reliable wastewater management for residential, commercial, and rural applications.



Choose from a range of sizes and configurations to suit your needs. Polymaster’s septic tanks ensure long-lasting performance and compliance with environmental regulations, making them the trusted choice for your waste management needs. Explore our septic tank options and protect your property with our robust, efficient solutions. 

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Our delivery areas

Our landscaping accessories and smaller supplies are available for delivery across Brisbane and the surrounding regions. Whether you're ordering a few essentials or coordinating with larger material deliveries, we offer prompt and flexible service throughout Brisbane to suit your schedule.

We deliver to a range of suburbs in South-East Queensland.

Delivery calculator

Our delivery calculator makes it easy to plan ahead with location-based estimates and flexible drop-off options. Whether you're a tradie or landscape contractor, this tool can assist you with dependable scheduling.

Need assistance? Speak to our friendly team

For help finding the right accessories or materials for your landscaping project, speak with our team today. We’ll make sure you’ve got everything covered, right down to the finishing touches. Visit our contact us page, and we’ll be able to assist you with your order.