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    Full off-grid home wastewater package

    WCTNZ® | Off-Grid Home Wastewater Package - CM8 System

    A full off-grid home wastewater package built around the Clivus Multrum™ CM8 composting toilet system and GreyFlow™ PRO greywater treatment pathway for customers planning a permanent off-grid dwelling, rural home, eco-home or larger cabin.

    This package separates toilet waste from the greywater treatment pathway and allows grease management, pump station requirements and land-application design to be matched to the site.

    Toilet system
    CM8
    Split composting system
    Dwelling
    Full off-grid
    Home / eco-home
    Greywater
    GreyFlow™ PRO
    Treatment pathway
    Supply
    POA
    Project-scoped
    Grouped package selection

    Build the package from the products below

    This off-grid home wastewater package is designed for permanent off-grid dwellings, rural homes, eco-homes and larger cabins where the toilet-waste pathway is built around the Clivus Multrum™ CM8 and the greywater treatment pathway is built around GreyFlow™ PRO.

    This is a situation-based grouped package rather than a fixed discount bundle. Select the required products and options below so the final package matches the site, use level and installation pathway.
    System pathway

    What this package is designed to cover

    Toilet-waste pathway
    Clivus Multrum™ CM8 split composting toilet system for the off-grid home toilet-waste pathway.
    Greywater treatment pathway
    GreyFlow™ PRO selected as the core greywater treatment pathway for the full off-grid home package.
    Kitchen wastewater
    Kitchen wastewater and grease management must be confirmed as part of the GreyFlow™ PRO and site design pathway.
    Pump station option
    Pump station or transfer pathway considered only where gravity fall is not available or where wastewater must be moved to a higher-level treatment or discharge point.
    Package components

    Recommended core products to select below

    Clivus Multrum™ CM8
    Core split composting toilet system for the off-grid home toilet-waste pathway.
    Pedestal / chute package
    Pedestal, chute and installation components selected according to building layout, subfloor clearance and installation design.
    GreyFlow™ PRO
    Core greywater treatment pathway for the full off-grid home package, selected to suit household loading, site conditions and land-application requirements.
    Grease management
    Passway™ grease trap or other grease-management pathway confirmed where kitchen wastewater enters the selected greywater treatment pathway.
    Pump station option
    Pump station or transfer pathway considered only where gravity fall is not available or where wastewater must be moved to a higher-level treatment or discharge point.
    Why these products are grouped

    A practical starting point for the situation

    • Built around a serious residential composting toilet system rather than a small portable or chattel-style product.
    • Uses GreyFlow™ PRO for the full-home greywater treatment pathway rather than a small diversion-only product.
    • Separates toilet waste from greywater design for a more robust off-grid home pathway.
    • Supports council, designer and wastewater professional review for full off-grid home projects.
    Site and consent context

    Final suitability remains project-specific

    Project pathway note: This package is normally reviewed as a project pathway rather than a fixed kit. Final system selection depends on user load, building layout, subfloor access, site levels, greywater source, soil conditions, land-application area and council requirements.
    NZ Building Code and council review: WCTNZ® can provide product information, technical documentation and consent-support information for customers, designers, builders, plumbers and wastewater professionals reviewing a full off-grid home wastewater pathway.
    Grey Flow PRO Builders Kit S
    GreyFlow™ | GREYFLOW PRO - STAGE 1 OF 2: BUILDERS KIT (PART A)
    GreyFlow™ | GREYFLOW PRO - STAGE 1 OF 2: BUILDERS KIT (PART A)
    SKU: GFPRO-A

    Choose the Product options below

    *

    Non-Trafficable: service access only (no foot traffic / no vehicles)
    Pedestrian: foot traffic only (typical AS 3996 Class A applications)
    Class C: higher surface loading may occur (driveways/light vehicles); ensure correct surround/support detailing (typical AS 3996 Class C = 150 kN ULS)

    Availability: In stock
    $2,703.65 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1–2 weeks (NZ-wide)
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    Clivus Multrum CM8 package
    Clivus Multrum™ | CM8 Next-Gen (Package)
    The CM8 Next-Gen is a high-capacity, luxury composting toilet with an effective sloping chamber design, perfect for families or light commercial use.
    SKU: CM-08PAC

    Choose the Product options below

    *

    Please select the primary pedestal (toilet fixture) option you would like to accompany your composting system.

    Note; that the Urine-Diversion (UD) pedestal option is most suitable where there is high use in peek or large family gatherings.

    Note; that with Urine Diversion, it is recommended that the compost mass is kept wet to avoid the pile drying out. Consider getting the hand-held bidet sprayer accessory for facilitating the hydration of compost.

    A hardwearing Nano-Ceramic Non-Stick Coating is applied onto the inner side of the Pedestal (toilet fixture) for maximum cleanliness.

    Note; basic cleaning will still be required.

    Note; non-stick is hydrophobic and repels liquids only.

    *

    Choose the fan voltage to match your power system. (Add additional fan units for replacement parts).

    All ELV (Extra Low Voltage) (12v-48V) are suitable for Off-grid power systems.

    *

    You may need additional vent materials depending on how many storeys your building has.

    Single Storey buildings with a high-profile roof (A frame or mono-pitch) require extra lengths of vent pipe - add one 800mm Vent Pipe Extension

    Double Storey buildings require extra lengths of vent pipe. Please add 4 x 1m Vent Pipe Extensions.

    Double Storey building with a high-profile roof (A frame or mono-pitch) require extra lengths of vent pipe - add one 800mm Vent Pipe Extension

    Kit for stepping the vent stack around the eaves of the roof. Allows you to avoid penetrating the roof.

    *

    A wind-driven vent offers the best redundancy for your system ventilation. The wind-driven vent will assist the fan under heavy wind conditions, keeping the system operational in the event of a power outage or fan failure.
    SharkVent™ | Wind Ventilator has high efficiency with a linear wind direction windvane (good for storm-prone areas).
    Universal Vent ACC | Wind-Driven Vent has high efficiency in low windage. 2 colours: white or black.

    Select this reducing collar to adapt the vent from 150mm to 100mm.

    Select this reducing collar to adapt the vent from 150mm to 100mm.

    Select this reducing collar to adapt the vent from 150mm to 100mm.

    *

    Choose how you'd like to manage the liquid (leachate) produced by your composting toilet system:

    Discharge to Drain or Trench
    Divert excess leachate to an approved soakage trench, drain field, or dispersal area. This option is suitable for most installations with available drainage capacity and may require a resource consent under the Resource Management Act 1991 (RMA), depending on your local council’s rules.

    Zero Discharge System (Reticulation)
    Select our sealed zero-discharge system to recirculate leachate back into the composting chamber for evaporation or absorption. Since no liquid is discharged to land, water, or air, this option falls outside the scope of the RMA and typically does not require resource consent. Ideal for sensitive environments, remote sites, or areas with strict discharge regulations.

    System sizes with Automatic or Manual reticulation dosing cycle options
    Automatic operations are on timer, and Manual operations are user-operated.

    Small 80L system - Suitable for a light-use system 
    Large 450L system - Suitable for a heavy-use system

    Availability: Availability - on backorder and will be dispatched once in stock (Special order – ready in approx. 3–4 months (non-stock item sourced specially from our supplier)).
    $9,363.23 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1–2 weeks (NZ-wide)
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    Grey Flow™ | GREYFLOW PRO  - STAGE 2OF 2: FINISHING KIT (PART B) - Manual Clean / 100 Watt Pump (B-M1)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Manual Clean / 100 Watt Pump (B-M1)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Manual Clean / 100 Watt Pump (B-M1)
    SKU: GFPS-B-M1
    Availability: In stock
    $1,057.51 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1–2 weeks (NZ-wide)
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    Grey Flow™ | GREYFLOW PRO  - STAGE 2OF 2: FINISHING KIT (PART B) - Manual Clean / 300 Watt Pump (B-M3)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Manual Clean / 300 Watt Pump (B-M3)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Manual Clean / 300 Watt Pump (B-M3)
    SKU: GFPS-B-M3
    Availability: In stock
    $1,264.19 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1 week (NZ-wide)
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    Grey Flow™ | GREYFLOW PRO  - STAGE 2OF 2: FINISHING KIT (PART B) - Manual Clean / 400 Watt Pump (B-M4)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Manual Clean / 400 Watt Pump (B-M4)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Manual Clean / 400 Watt Pump (B-M4)
    SKU: GFPS-B-M4
    Availability: Availability - on backorder and will be dispatched once in stock (On back-order – expected in approx. 2–3 months).
    $1,470.86 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1 week (NZ-wide)
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    Grey Flow™ | GREYFLOW PRO  - STAGE 2OF 2: FINISHING KIT (PART B) - Automatic Clean / 100 Watt Pump (B-S1)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Automatic Clean / 100 Watt Pump (B-S1)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Automatic Clean / 100 Watt Pump (B-S1)
    SKU: GFPS-B-S1
    Availability: In stock
    $1,884.21 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1–2 weeks (NZ-wide)
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    Grey Flow™ | GREYFLOW PRO  - STAGE 2OF 2: FINISHING KIT (PART B) - Automatic Clean / 300 Watt Pump (B-S3)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Automatic Clean / 300 Watt Pump (B-S3)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit- Automatic Clean / 300 Watt Pump (B-S3)
    SKU: GFPS-B-S3
    Availability: In stock
    $2,090.89 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1–2 weeks (NZ-wide)
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    Grey Flow™ | GREYFLOW PRO  - STAGE 2OF 2: FINISHING KIT (PART B) - Automatic Clean / 400 Watt Pump (B-S4)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Automatic Clean / 400 Watt Pump (B-S4)
    Grey Flow™ | GREYFLOW PRO - STAGE 2 of 2: Finishing Kit - Automatic Clean / 400 Watt Pump (B-S4)
    SKU: GFPS-B-S4
    Availability: Availability - on backorder and will be dispatched once in stock (On back-order – expected in approx. 2–3 months).
    $2,297.56 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1–2 weeks (NZ-wide)
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    Shipping Method
     
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    Estimated Delivery
    Price
    No shipping options