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    GreyFlow™

    WCTNZ® is proud to be the official distributor of GreyFlow™ composting toilets in the Realm of New Zealand (New Zealand, the Cook Islands, Niue, Tokelau and the Ross Dependency)

     

    GREYFLOW™ World Leading Greywater Diversion Technology. Reduces water bills, uses fewer water resources, irrigates your garden during water restrictions, and decreases demand on energy for sewage transport.

    GreyFlow™ sets the standard in greywater diversion. Reuse shower and laundry water via compliant GreyFlow™ systems so you save water, keep gardens thriving through water restriction periods, and reduce network/onsite system load.

    The GreyFlow™ GWDD range is WaterMark™ certified and award-winning (2018 Australian Water Association).

     

    Cut mains water use & bills

    Keep gardens alive in restrictions

    Lower load on sewers/onsite systems

    Reliable, low-maintenance filtration & pumping

    ✓ WaterMark™ Certified

     

    Say yes to greywater done right

     

    Notes: Greywater systems are a great way to save water. In New Zealand, the compliant method is subsurface land application (below ground)—not surface/sprinkler irrigation—so you can reuse greywater safely and within council rules.


    WCTNZ® | Waterless Composting Toilets NZ Limited | Copyright 2025 ©

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    GreyFlow™ | GREYFLOW GRAVITY (no pump)

    GW EZGREY-M1-copy
    GREYFLOW GRAVITY is a non-pumped, gravity-fed greywater filter and diverter for tiny homes and off-grid builds. Suited to modest greywater volumes (typically shower, bathroom basin and laundry) where you have reliable fall to a subsurface greywater field. 100mm dwv inlet + outlet.
    $1,000.00 excl GST

    GreyFlow™ | PRO Filter

    GW GFFT-250-Pro
    Replacement or spare filter for the GreyFlow™ PRO greywater diversion device.
    $99.13 excl GST

    GreyFlow™ | PS Filter

    GW GFFT-250-PS
    Replacement or spare filter for the GreyFlow™ PS greywater diversion device.
    $99.13 excl GST

    GreyFlow™ | Pump Station 1500W Grinder Pump

    GW BIA-B120GS2
    Replacement or pump for the GreyFlow™ greywater diversion devices
    $2,050.36 excl GST

    GreyFlow™ | PS-AG-M1 (Manual 100W) - 100mm inlet

    GW GFPS-AG-M1
    The GreyFlow™ PS-AG-M1 Manual 100W is suited for low-flow greywater diversions where average users of 1-3 people full time are in residence and there is slightly hilly ground for the irrigation discharge fields. Max Head 6.5M Max Flow 70 LPM (suited for land application areas that are flat with elevations no more than 1 meter)
    $1,837.78 excl GST $1,699.95 excl GST

    GreyFlow™ | PS-AG-M3 (Manual 300W) - 100mm inlet

    GW GFPS-AG-M3
    The GreyFlow™ PS-AG-M3 Manual 300W is suited for medium flow greywater diversions where an average user of 2-5 people full time is in residence and there is hilly ground for the irrigation discharge fields. Max Head 8M Max Flow 180 LPM (suited for land application areas that are flat & hilly with elevations no more than 3 meters)
    $2,044.45 excl GST