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About WCTNZ®

New Zealand’s trusted name in composting toilets, greywater systems, and practical alternative wastewater solutions.

WCTNZ® works with homeowners, tiny house builders, rural property owners, commercial operators, councils, accommodation providers, and public-use projects across Aotearoa New Zealand.

WCTNZ® showroom and warehouse in Henderson, Auckland

Proudly Kiwi owned and operated since 2007

Since 2007, WCTNZ® has built a reputation for supplying quality composting toilet and greywater solutions, providing practical product advice, and supporting customers through real projects with real site constraints.

Since

2007

Serving New Zealand projects

Real

People

Practical advice from a specialist team

Quality

Systems

Products selected for real use cases

Focused

Support for local project conditions

Who we are

A specialist wastewater company with practical experience

Waterless Composting Toilets NZ Limited, trading as WCTNZ®, supplies and supports composting toilets, greywater systems, pump stations, toilet buildings, and related alternative wastewater solutions for a wide range of New Zealand projects.

Our work is built around practical system selection. A good result depends on more than choosing a product from a list. The system needs to suit the building, the site, the expected use, the servicing pathway, and the long-term outcome the customer needs.

This is why WCTNZ® focuses on guidance, product knowledge, and ongoing support. We help customers understand the likely system pathway before they commit to a solution.

What we stand for

Real people, quality products, and real support

Real people

WCTNZ® is a New Zealand business run by people who understand alternative wastewater systems, site constraints, customer concerns, and the practical decisions that go into a successful project.

Quality products

We supply proven composting toilet and greywater technologies designed to provide practical, long-term alternatives to conventional wastewater pathways where the project suits that approach.

Real support

Customers often need guidance before purchase, during installation planning, and after the system is in use. WCTNZ® supports customers with product knowledge, parts, consumables, and practical advice.

Sustainable impact

We believe waterless and alternative wastewater systems can support better resource use, reduce unnecessary dilution, and help customers think more carefully about sanitation design.

What we supply

Solutions for homes, baches, tiny houses, commercial sites, and public projects

WCTNZ® works across a broad range of project types. Some customers need a compact self-contained composting toilet. Others need a larger split or continuous system, a greywater pathway, a pump station, a toilet building, or a wider package that considers several parts of the wastewater solution together.

Our customers include homeowners, rural property owners, tiny house builders, accommodation providers, commercial operators, councils, community groups, and public-use facilities.

Every project is different. WCTNZ® focuses on matching the system to the real site, real use pattern, and real servicing expectations, rather than treating every customer as though they need the same product.

Our approach

Practical advice before product selection

Composting toilets and greywater systems work best when they are selected carefully. The right pathway depends on the project type, the number of users, whether use is full-time or part-time, the building layout, the available services, and the customer’s expectations around maintenance and long-term operation.

WCTNZ® helps customers think through these details before committing to a system. That approach helps reduce avoidable mistakes and gives customers a clearer understanding of what is likely to suit their project.

Our environmental position

Sensible sanitation for a more resource-aware future

WCTNZ® believes that wastewater systems should be selected with care. Composting toilets and greywater systems are not only about reducing water use. They can also support better source separation, reduce unnecessary dilution, and encourage more thoughtful sanitation design where the site and system pathway are suitable.

We do not see waterless systems as a compromise. In the right application, they can be a serious, practical, and long-term design choice for residential, rural, commercial, public, and off-grid projects.

Talk to WCTNZ® about your project

If you are planning a composting toilet, greywater system, pump station, toilet building, or wider wastewater package, WCTNZ® can help you identify the most suitable starting point.

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