Trusted Team for all your Septic Needs:

Concrete septic tank, round-shaped lid made of cement, septic tank for dirty water, installation of concrete rings,

Traditional Septic Tank Design

We design fully compliant primary treatment OSET septic systems, tailored to your site for safe, reliable, and cost-effective wastewater management.

Septic system construction

Secondary Treatment Plant Design

We design advanced OSET treatment systems that deliver cleaner, safer effluent—perfect for sensitive sites and tighter council requirements.

Installation of multiple domestic wastewater tanks in construction site

Eco-friendly Wastewater Design

We create eco-friendly wastewater designs—from composting toilets to worm-based systems—giving you a sustainable, low-impact solution that’s practical and compliant.

Man holding a Tuf - Tite filter of septic system tank and water wells.

Professional Septic Tank Inspection

We provide comprehensive septic tank inspections, complete with a simple report to ensure your system is safe, compliant, and performing as it should.

Installation of concrete tanks

Orchard and Rural Toilet Design

We design practical, compliant toilets for orchards and rural sites, tailored to handle seasonal or high-use demand while protecting your land and the environment.

A cast iron sewer hatch is being installed in a concrete well, in preparation for the installation of a water sewer well in the ground.

Residential Wastewater Pump Station Design

We design compliant, council-ready wastewater pump stations for residential sites where gravity flow isn’t an option - safe, reliable, and tailored to your property

Using an excavator to bury a 10 m3 concrete septic tank located in the garden next to the house.

Commercial and High-Volume Systems

We design robust, compliant wastewater systems for commercial sites and high-use properties, tailored to handle larger flows safely and efficiently.

Hands, engineer and clipboard in city for checklist, inspection notes or safety compliance. Person, writing or outdoor with documents for urban development, project management or supervisor paperwork

Building Consents, Resource Consents, DPAs and Abatements

We take care of consents, approvals, and abatement notices, making the council process straightforward and stress-free

Need something else?

If it's to do with water, we do it! Feel free to reach out for pricing anytime. We'll talk through your needs and provide a GUARANTEED FIXED PRICE for our service + 100% MONEY BACK GUARANTEE.
Using an excavator to bury a 10 m3 concrete septic tank located in the garden next to the house.

Contact Our Team

Reach out to NZ's leading independent septic tank specialists for all inquiries.

[email protected]

0800 MY NEW DUNNY (0800 696 393)

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