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Concrete Septic Tanks in St George 

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Built to Withstand Harsh Conditions

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Custom Precast Solutions Available

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Fast Delivery Across NSW & QLD

Talk to the Team in St George

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St George Concrete Septic Tanks

40

Years
Experience.

Installing a septic system in St George or the Balonne Shire? You need something that’s tough, compliant and ready to perform from day one. At Graham’s Precast Concrete Products, we’ve been supplying reinforced concrete septic tanks to rural Queensland for over 40 years—helping property owners, builders and contractors get the job done right with less stress and better results.


Our tanks are cast off-site, sealed for long-term reliability and built to handle shifting soil, heavy use and unpredictable weather. With crane delivery included, placement is fast and clean, even on sloped or hard-to-access sites. There’s no waiting for concrete to cure or setting up formwork—just a smooth, efficient install. We also supply reed beds and plumbing-ready fittings for a complete wastewater setup tailored to your block.


We focus on practical service and proven solutions. St George locals rely on us for straightforward advice, dependable products and delivery that turns up when it’s supposed to.


Give us a call on (02) 6632 2978 to get started.

Built to withstand Aussie conditions.

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Rural-Ready Systems That Last

In the St George region, conditions can vary—hot, dry weather, shifting soils and long distances between properties are the norm. That’s why we build our precast septic tanks to handle the realities of regional living.


Cast off-site and delivered fully formed, each unit is ready for crane placement—no formwork, mess or curing delays. It’s a faster, cleaner way to get your system in the ground. Our tanks are reinforced for structural strength and long-term protection against leaks, corrosion and movement.


We’ll help you select the right size, fittings and layout for your property, whether you're off-grid, farming or building a new home. Need a more sustainable solution? We also supply concrete reed beds that support eco-friendly wastewater treatment.


With decades of hands-on experience, our team offers practical support, responsive communication and service you can count on. From planning to placement, we’re here to make your septic install stress-free and built to last.

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Why Locals Choose Our Tanks

Our tanks are trusted across St George and the wider Balonne Shire. They’re designed to perform in rural conditions and help make installation simple, reliable and efficient.


We understand the local landscape and the practical needs of regional properties, which is why our products are built to get the job done right. With decades of hands-on experience, we deliver solutions that save time, reduce labour and stand up to long-term use.


  • Fully precast and ready to go: Avoid on-site construction delays
  • Crane delivery and placement: Saves time and suits remote blocks
  • Compliant and watertight: Built to meet national standards
  • Custom fitting options: Adaptable for unique setups and layouts
  • Optional reed beds: Complete your system with eco-friendly treatment
  • Helpful team, fast turnaround: From quote to delivery, we’ve got you covered


Whether you’re developing a new block or replacing an old system, our concrete septic tanks are a smart, durable choice. We’ll help you find the right setup and get it to site without delay—so your project stays on track from day one.

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Concrete Water Troughs

If you’re looking for a feed trough that can handle a few kicks from pushy livestock, our precast concrete option is ideal. This product is safe, stable, and long-lasting.

Civil Construction Products

Septic Tank Installation

We provide reliable septic tank installation services across St George. With crane delivery and decades of experience, we ensure a clean, efficient setup that suits your site layout and gets the job done right the first time.

Concrete Cattle Grids

Keep cattle where they belong with our precast concrete grids. Built for heavy use and delivered with precision, these long-lasting solutions are perfect for busy farm access points and rural driveways in the St George region.

Civil Construction Products

Need strong, durable infrastructure components? Our precast civil products, including headwalls, are ready to install and built to support local projects around St George. They save time on site and perform well in regional conditions.