Our Products

Deciding on any type of sewage treatment system is a big decision so it is essential to make the right choice, for you and your circumstances in view of ‘future proofing’ your home and your investment.


Which NaturalFlow System will best suit your site?

Based on a number of innovative modules, the NaturalFlow Wastewater and Sewage Systems are very flexible and adaptable to any site challenges you may face at your place.

In deciding which is the best system for your place there are a few main areas or points to consider;

  1. The Council requirements in your area – in relation to site size, treatment levels etc…If unsure just give our friendly Team a call and they will help.
  2. The impact on the environment at your place – The higher the treatment level the lesser the impact on the environment or the soils and the greater ‘Future Proofing’ you will acquire.
  3. Water tables – where this is under 1200mm you will usually need to go to a Secondary Treatment System
  4. Section/Site size – this varies a little between Councils but typically under 2500m² you will need Secondary Treatment System (although in some areas Advanced Primary Plus is still fine)
  5. Soil type – any soil’s with high clay content are slow draining and the higher the treatment level you go to, the better

Also note that every site is a little unique so if you are not sure which Series is most suited to your site please call our friendly team now on 0800 628 356 or email [email protected] they are there to help you through any and every stage of your project and also remember they will look after all your Council Consent requirements in view of your project progressing without a hitch!

Features and Benefits

The NaturalFlow systems take New Zealand’s residential and commercial sewage systems to the next level of sustainability and performance, providing homeowners and communities with numerous benefits.

Power-free Treatment Process

With the help of natural filtration processes and Tiger worms, NaturalFlow systems utilise natural biological purification processes. Our systems do not draw on any resources other than nature, operating quietly without complicated mechanics or high-tech electronics. They mimic nature to treat sewage water, working very much like the forest floor.


Our sewage systems offer great savings. As they use the sustainable forces of nature, they do not require power to treat sewage and wastewater, helping you save on electricity bills.


Low Maintenance

Similar to a natural ecosystem, the NaturalFlow system takes care of itself. It doesn’t need constant monitoring, maintenance and repairs. Owners simply need to perform frequent visual checks and follow the basic guide provided by us.

Hassle-free Installation

The NaturalFlow team of registered drain layers and certified installers takes care of everything from installation to council sign off. All work undertaken complies with the latest regulations such as the AS/NZS 1547:2012 and the NZ Building Code.



Waterflow NZ Ltd warrants that the NaturalFlow system will be free from defects in material and workmanship for the following periods of time from the date of installation as set out in the following conditions:

  • Roto-Moulded tanks and components 15 years
  • Filter media 15 years
  • Dosing float and/or pumps 2 years
  • Waterflow NZ Ltd will at its discretion replace or repair such components that prove to be faulty with the same or equivalent part at no charge.
  • Warranty of operation only covers the performance of the NaturalFlow systems as connected to the effluent inflow for which they are designed, and also installed to the criteria as set out in the relative installation instructions and procedures.

Find An installer

Waterflow NZ Ltd cares for it all!
Waterflow NZ Ltd will facilitate this from the beginning to the end, starting with Certified NaturalFlow Installers to full completion Council sign off when install is complete.

Talk To Us Today

Waterflow NZ Ltd has professional Installers and Designers that cover every region of New Zealand, so where ever you are situated from the Cape to the Bluff, just call our friendly team now to find out the closest one to you.


What Others Think

“Gee I love you guys :)”

I was called this morning from Rangi to say the 6-monthly inspection is being done at 2pm today.

Your guy doing it has been held up, so he actually called to let me know.
This is never happens normally with tradie type people.

If your company ever needs someone to sell your systems up this end of the woods then give me an interview.
After my experience with all your people, I would be proud to sell it!

Kim Robson


What Others Think


“NaturalFlow system is such a basic and easy system to look after and operate. We are very pleased with it and are glad we went with the system. The grey water has certainly been great on the gardens and the black water bed once planted looks after itself. Great!”

Dennis & Marie


What Others Think

“Looks after itself”

“Back in 2008 along with our building projects we decided to go for the NaturalFlow sewage system as it didn’t require any power, on our site. We have been very impressed with the performance of this system, with very little maintenance, it basically looks after itself.
Without hesitation I would recommend the NaturalFlow system to anyone as I have had no difficulties with product or the friendly team at Waterflow NZ Ltd. 



What Others Think

“Low site impact”

Just a quick email to say a huge thank to you , ken & the team.
Stoked with the work done , the boys on the diggers did a awesome job .
Every thing was left nice & tidy , super happy !!
Xmas bonus for all !!

John Cullen