About GreyFlow™

If you're looking to enhance sustainability and efficiency in your home, GreyFlow™ greywater filtration systems are your perfect solution. GreyFlow™ systems provide exceptional screening of greywater, removing problematic particulates and ensuring compliance with professional land application field discharge standards through high-reliability dripper systems.

GreyFlow™ captures everyday household greywater—showers, laundry, and basins (not kitchen)—filters it, and redistributes it to your garden via sub-surface drip irrigation. The result is healthier planting and less mains water use, with discharge kept safely below mulch or soil for hygiene and compliance.

Built around a compact pump-pit, dual-stage filtration, and smart float control, GreyFlow™ is engineered for New Zealand conditions and practical maintenance. Choose manual-clean filters for simple sites, or self-cleaning (automatic) filtration where access is tight or usage is higher.

Designed by a qualified hydraulic and wastewater engineer and fully WaterMarked, GreyFlow™ systems have been the gold standard in the Australasian market for over 20 years.

Their excellence was recognised with the 2018 Australian Water Association Award for Innovating for Sustainable Water & Environmental Outcomes.

GreyFlow™ offers scalable solutions tailored to your needs, from compact systems ideal for standalone tiny homes to more extensive setups for commercial applications. Whether you’re retrofitting an existing home or pre-planning a new build, the system integrates cleanly with plumbing and landscaping. A consistent hardware platform and approved dripline make installs tidy and repeatable for licensed plumbers.

GreyFlow™ is ideal for off-grid homes looking to stretch water, urban homes wanting greener landscapes, and lifestyle properties aiming to reuse water responsibly. WCTNZ® provides product selection help, installer support, and after-sales guidance so your system stays reliable, efficient, and easy to live with.

Before installation, be sure to consult with your local authorities to ensure compliance with regional regulations.

Choose GreyFlow™ and join the movement towards a more sustainable and efficient lifestyle.

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