NaturalFlow CSX120

NaturalFlow CSX120 The NF CSX120 system is a 4-module combination capable of treating a total daily flow volume of 8000 litres to a secondary treatment level.

NaturalFlow CSX120

Passive, power-free treatment for a wide range of commercial properties.


With its robust design, created for New Zealand conditions and its ability to treat up to 8000L of wastewater per day using vermicomposting and air assisted options, this system is ideal for larger commercial facilities of 100+ people, fruit picking accommodation, event centres and marae.

With a completely power-free treatment process, NaturalFlow provides passive breakdown and treatment of waste that is silent, odourless and doesn’t need ongoing septic pump outs.

Treatment levelSecondary
ApplicationCommercial, community, Maraes & light commercial
Robust design Made from concrete, the NF CSX120 is strong and robust, and offers a large capacity to suit properties that require their wastewater treatment system to process a large volume of water daily. It can also be fully buried for seamless integration into your landscape.

If your site is suitable, you can also use a gravity discharge option, removing the need for any pumps. For gravity to work, you will require a fall of at least 3m from the top of the system to the start of the disposal area; our slope calculator can help you work out what fall you have.

Black and grey water management requirements With this system the plumbing must be separated into black and grey.

The black water drainage includes your toilets and kitchen sink, all the rest is grey water (laundry, showers, basins etc.). This improves the performance of the system by reducing the amount of liquid passing through the worm bed (they like to be damp, but they’re not into swimming). It also keeps laundry powders and other chemicals out of the worm bed, protecting them, and giving you more flexibility around which products you can use.

It can discharge via LPED surface or subsurface laid, ETS bed, soakage bed, conventional trenches, mounds, sand trenches and arches.


Specifications and product details

Please find details and specifications for download below.

NaturalFlow Brand Specifications
Home Owners Guide
Product Specifications

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Protecting the Future of Your Property and our Shared Backyard
At WaterFlow we are with you from start to finish – and beyond. Once installation has finished, we are still on hand to provide, maintenance, support and servicing.

Discover ways to maintain your systems in between servicing and how to contact our expert service technicians.


All you need from first inspection to post-install support

For trade professionals, working with WaterFlow means gaining a reliable lifelong partner committed to achieving project success, and a team that values collaboration, precision, and timely execution.

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