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    GreyFlow™

    Greywater reuse systems

    GreyFlow™ systems for reuse, diversion and pumping

    GreyFlow™ helps suitable homes, tiny houses, baches and off-grid sites manage greywater from showers, bathroom basins, laundry and, where the project is designed for it, kitchen wastewater.

    The range includes gravity-fed diverters, compact pumped diversion systems, PS-AG manual and automatic units, dripper fields, pump stations, filters, pumps and system accessories.

    Lighter greywater
    Shower, basin, laundry
    Typical GWDD pathway
    Kitchen-inclusive
    Heavier greywater
    Needs more design care
    System options
    Gravity or pumped
    Manual and automatic
    Infrastructure
    Pump stations
    Wastewater lifting options
    Why GreyFlow™

    The right pathway for greywater reuse

    • Reuse suitable shower, bathroom basin and laundry greywater instead of sending it straight to sewer, septic or wastewater treatment.
    • Support gardens and landscape areas through dry periods and water restrictions where the site is suitable.
    • Reduce demand on mains water and help lower load on sewer, septic and onsite wastewater systems.
    • Choose from non-powered gravity diversion, compact pumped diversion, larger PS-AG systems and automatic backflushing options.
    • Handle kitchen-inclusive greywater through the correct pathway where grease, food solids and higher organic loading need additional design consideration.
    Choose your pathway

    GreyFlow™ product groups

    Diversion devices
    Gravity, EZGREY™ and PS-AG systems for diverting suitable shower, bathroom basin and laundry greywater to a subsurface land-application field.
    Kitchen-inclusive projects
    Kitchen wastewater is still greywater, but it is heavier and may require grease management, treatment, pumping or a more controlled system pathway.
    Dripper fields
    Dripper line and expansion kits used to distribute diverted greywater below the surface as part of a complete GWDD pathway.
    Pump stations
    Underground pump stations, grinder pumps and alarm accessories for wastewater lifting where gravity fall is not available.
    Parts and servicing
    Replacement filters, pumps, alarm kits and access covers for maintaining and supporting installed GreyFlow™ systems.
    System context

    Greywater needs the right full pathway

    The GreyFlow™ GWDD diversion range includes WaterMark™ certified products and award-winning greywater diversion technology. Pump stations, accessories and replacement parts should be selected according to their own product documentation and project requirements.

    In New Zealand, greywater reuse normally requires subsurface land application rather than surface or sprinkler irrigation. Final suitability depends on the greywater source, site levels, soil, land-application area, plumbing layout and local council requirements.
    Kitchen wastewater is treated by WCTNZ® as greywater, but it is usually a heavier and more demanding greywater stream because of grease, oils, food solids and higher organic loading. It may require grease management, treatment, pumping or a different system pathway.
    Need advice?

    Start with the right greywater guidance

    Greywater systems are selected project by project. The right pathway depends on the wastewater source, level of use, intended outcome, site levels, soil, available land-application area and local requirements.

    WCTNZ® is proud to be the official distributor of GreyFlow™ greywater systems in the Realm of New Zealand, including New Zealand, the Cook Islands, Niue, Tokelau and the Ross Dependency.
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    GreyFlow™ 6 Way Rotor Valve

    GW GFRT 6
    Hydraulic 6-way rotor valve for sequential greywater distribution across 2, 3 or 6 irrigation zones without external power.
    $278.26 excl GST

    GreyFlow™ Flush Valve Kit (X2 Valves)

    GW GF-FVx2
    End-of-line GreyFlow™ flush valve for dripper fields, helping clear sediment and maintain cleaner greywater irrigation performance.
    $130.43 excl GST

    GreyFlow™ | PS-AG | Complete Range of Above Ground (AG) Greywater Diversion Systems

    GW GFPS-AG-###
    GreyFlow™ | PS-AG | Complete Range of Above Ground (AG) Greywater Diversion Systems

    GreyFlow™ PRO | 2-Stage | Below Ground (Whole-of-House System)

    GW GF-PRO
    The range of GreyFlow™ PRO 2-Stage installation system greywater diversion systems is suitable for the new build, where the plumber needs to prefix the tank (access pit) and the finishing kit later on.

    GreyFlow™ | Feeder Pipe - Flow Restrictor

    GW GF-CV25
    GreyFlow™ flow restrictor for downhill feeder-pipe runs where the slope exceeds 3°, supplied with barb fittings, clips and check valve.
    $49.26 excl GST

    GreyFlow™ | Feeder Pipe - Flow Restrictor 6X Kit

    GW GF-CV25-6xKit
    Six-pack GreyFlow™ flow restrictor kit for downhill feeder-pipe runs, suited to standard 100m dripper fields with seven 14m runs.
    $270.00 excl GST