BIOROCK, the best residential wastewater treatment system without electricity, zero energy, 25 year tank warranty!


For any inquiries or questions regarding our products and for a free quote please contact our local BIOROCK Specialist.


Multiple advantages

Revolutionary technology

  • No electricity required
  • No moving parts
  • 24 hour start-up
  • Long absence periods acceptable

Unique comfort

  • Totally silent
  • Very low operational costs
  • Superb effluent quality
  • Septic tank conversion unit (retrofit)

Sustainability highlights

  • Long lifespan BIOROCK Media
  • Low carbon footprint
  • Minimum annual maintenance
  • Long de-sludge interval

Our residential On-Site Wastewater Treatment Plants

BIOROCK offers a complete range of compact and non-electric residential wastewater treatment plants, from 4 to +200 person systems. BIOROCK power-free Wastewater Treatment Plants offers an ideal solution for residential, domestic wastewater treatment.

A BIOROCK provides a revolutionary, efficient and reliable wastewater treatment solution. Very compact, our systems do not require a blower or air diffusors. Electricity is not required for the treatment process therefore maintenance is minimal and repair costs low. These unique advantages and long desludge intervals provide low operational costs and give the user costs savings when compared to conventional wastewater treatment plants. The reliability of the system is maximised, with no possible breakdowns, therefore no need for expensive spare parts.

The cost saving Wastewater Treatment Solution

The on-going operational cost is one of the most important considerations when buying a Wastewater Treatment Plant. Electric On-Site Treatment Plants involve expensive operational costs. By combining competitive acquisition costs with the lowest running costs, BIOROCK is an investment for your future.

Download our brochures

See our range of products

Testimonials and case studies

With 25 years in the wastewater industry, BIOROCK is proud to provide its customers with modern, effective, economical and sustainable Wastewater Treatment Solutions.

Click on the pictures for an overview of some BIOROCK installations throughout New Zealand.


Very low operational and maintenance costs guarantee significant savings

No energy costs for the treatment process
Long primary tank desludging intervals: 3-4 years
Minimal maintenance and repair costs. Not prone to failure. No breakdowns, thus no need for expensive spare parts

(*) Compared to conventional wastewater treatment plants


When buying a wastewater treatment plant in New Zealand: BIOROCK! The low-maintenance, non-electric onsite wastewater treatment system.

Installation for all types of ground conditions and applications

- Structurally sound in all ground conditions such as high ground-water sites.

- Ability to handle intermittent (seasonal) wastewater loadings, even during long absence periods. Ideal for Holiday Homes, Campsites, Caravan Parks, Schools and Maraes etc

- Can also handle low utilization levels without compromising the treated effluent quality. 

- BIOROCK Non-Electric septic Tank Conversion Unit: Our plant can be added to an existing septic tank

Excellent final effluent test results

BIOROCK Residential On-Site Wastewater Treatment Systems achieved a 99% reduction in pollutants during the EN 12566-3 test period. This is an astonishing level of purity for a domestic wastewater treatment plant.

More information: Read Traditional VS BIOROCK

Unique advantages

  • Completely odourless and silent
  • Excellent treatment performance
  • Free Initial Consultation
  • Installation supervised by trained BIOROCK professionals 


BIOROCK (NZ) Ltd was established in 2013 to market BIOROCK® domestic wastewater treatment systems throughout New Zealand. BIOROCK (NZ) Ltd has an exclusive distribution agreement with BIOROCK S.à.r.l for the territory of New Zealand.

Read more





Media: 10 years
Tanks: 25 years

Ask for our conditions

About BIOROCK Media

The huge surface area of BIOROCK media ensures excellent colonisation of the most effective bacteria, a process which is essential for the effective treatment of domestic wastewater.

The BIOROCK media is highly resistant to degradation and remains extremely stable over the long term - BIOROCK's 25 years experience in the industry is proof of this.

  • Very stable inorganic material - does not break down over time, unlike "organic" media.
  • Requires little maintenance - scraping and scarification is not necessary, unlike organic media.
  • The structure and composition ensures unsurpassed and unique surface treatment with exceptional purification results.
  • 100% recyclable ecological material

BIOROCK offers a much more efficient and ecological wastewater treatment technique compared to traditional techniques that are very high in maintenance and energy consumption.

An Independant Organization has just ranked the BIOROCK Media as the most efficient Media of its category: Read here