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    Aqua Clarus M800sx | Domestic Greywater Treatment System

    SKU: GW AC M800SX
    Aqua Clarus M800sx treats separately collected household greywater using biological treatment, membrane filtration and UV disinfection. Up to 800 litres per day for project-approved non-potable reuse, including toilet flushing, washing-machine cold feed and garden irrigation.
    POA – Price on Application
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    Products
    Aqua Clarus

    Domestic greywater treatment

    Household greywater.
    A useful resource, treated for reuse.

    The Aqua Clarus M800sx combines biological treatment, membrane filtration and ultraviolet disinfection in an above-ground cabinet.

    The M800sx treats separately collected household greywater so it can be reused for toilet flushing, washing-machine cold feed and garden irrigation within a properly designed non-potable water system.

    Aqua Clarus M800sx tall greywater treatment cabinet, product visualisation
    Aqua Clarus M800sx cabinet visualisation.
    Up to 800 L/dayTreatment capacity
    Up to 8 peopleHousehold greywater treatment
    AU Level 1Treated-greywater quality target
    1,800 mm high1,100 mm wide × 720 mm deep
    On this page

    The opportunity

    Reuse where your household can benefit

    A well-planned reuse system matches the greywater your household produces with useful, regular demand. Typical applications include toilet flushing, washing-machine cold feed and garden irrigation.

    01 / TOILET FLUSHING

    Use treated water for flushing

    A dedicated non-potable supply can feed toilet cisterns, with drinking-water protection and backup water arranged as part of the installation.

    02 / LAUNDRY

    Supply the washing-machine cold feed

    Treated greywater can supply the washing-machine cold feed where the appliance and installation suit the application. Correct water quality and hygienic storage remain important.

    03 / GARDEN

    Match reuse to the landscape

    Treated greywater can support garden irrigation where the irrigation method, soil, slope and available land area are suitable for the intended reuse.

    Water savings vary from home to home. The amount of mains water you can offset depends on how much suitable greywater is collected and how consistently it can be reused.

    Your system package

    The M800sx at the heart of a complete reuse system

    The M800sx is the treatment cabinet at the centre of the system. A complete installation also brings together greywater collection, transfer where required, electrical supply, treated-water storage and delivery, plus appropriate bypass and residual-water arrangements.

    A typical WCTNZ® package pairs the M800sx with a GreyFlow collection/diversion device to collect, screen and transfer household greywater where pumped transfer is required.

    Our team can provide a comprehensive quote covering the components that make up your system package, including collection, treatment, storage, controls, delivery equipment and installation-related options as required.

    Planning your system

    Keep the greywater stream clearly separated

    For a typical household system, WCTNZ® collects greywater from showers, baths, handbasins and normal washing-machine discharge. Kitchen sinks, dishwashers, toilet waste and roof runoff stay on their own separate pathways.

    The treated water is for non-potable reuse, not drinking. Toilet waste and any wastewater not collected for reuse continue through the property's normal wastewater system.

    To select the right package, we look at the connected fixtures, expected daily and peak flows, available space and access for servicing.

    How it works

    Collection, treatment and reuse

    The M800sx sits between greywater collection and the final reuse supply, providing the core treatment stages in one compact cabinet.

    1. Collect and transfer

      Selected household greywater is collected and screened, then transferred to the M800sx. Where gravity feed is not practical, a collection pit and pump provide the transfer.

    2. Biological treatment

      Inside the M800sx, the greywater recirculates through a trickle-bed bioreactor where the biological treatment process breaks down biodegradable material.

    3. Membrane filtration

      Following biological treatment, the water passes through ultrafiltration, adding a physical filtration barrier before disinfection.

    4. Ultraviolet disinfection

      The filtered water then passes through UV disinfection before entering the internal treated-water tank ready for pumped discharge.

    5. Store and deliver for reuse

      Where required, external treated-water storage and delivery equipment can be added to suit the chosen reuse applications, together with the appropriate backup and overflow arrangements.

    Treatment quality

    AU Level 1 quality target with Advanced Secondary + Tertiary treatment

    The M800sx uses three complementary treatment stages — biological treatment, ultrafiltration and UV disinfection — to produce high-quality treated greywater for non-potable reuse.

    AU Level 1 quality target

    BOD: below 10 mg/L
    TSS: below 10 mg/L
    E. coli: below 1 cfu/100 mL

    NZ treatment context

    In familiar NZ treatment terms, the process combines Advanced Secondary treatment with tertiary ultrafiltration and UV disinfection.

    Multi-barrier treatment: ultrafiltration adds a physical barrier beyond the biological stage, while UV provides a separate disinfection step before the water is returned for reuse.

    Product information

    Aqua Clarus M800sx specifications

    Cabinet and application information
    Brand / modelAqua Clarus / M800sx
    Product typeAbove-ground domestic greywater treatment cabinet
    Published capacityUp to 800 litres per day
    Household scopeUp to eight people, with final selection based on actual household greywater flows
    Cabinet dimensions1,100 mm wide × 720 mm deep × 1,800 mm high
    Cabinet footprint0.792 m² cabinet footprint; allow additional space for the base, connections and service access
    Core treatmentBiological trickle-bed treatment, ultrafiltration and UV disinfection
    Treatment qualityAU Level 1 target; NZ treatment context: Advanced Secondary + Tertiary UF/UV
    Treated-water deliveryInternal treated-water tank with pumped discharge; external storage and delivery can be added to suit the reuse design
    Selected source streamsShowers, baths, handbasins and normal laundry discharge
    Supply configurationSystem package tailored to suit the collection, treatment, storage and reuse requirements of the property

    Allow suitable base support, service access and connection space around the cabinet.

    Planning the installation

    Allow for the cabinet—and room to maintain it

    The above-ground cabinet keeps the treatment equipment accessible for servicing. It should sit on a suitable level base with the required restraint, electrical isolation and clear access to removable panels and components.

    New builds and renovations make it easier to plan the separate greywater collection and non-potable return lines alongside the property's other services. Existing homes can also be assessed for a practical retrofit pathway.

    The collection device should remain accessible for maintenance, with bypass, overflow and service-water arrangements planned to suit the property's wastewater system.

    Rainwater tanks can sit alongside the Aqua Clarus system, while rainwater, untreated greywater and treated greywater remain clearly separated within the overall water-services design.

    Aqua Clarus M800sx visualisation beside a house with separate slim rainwater tanks
    Residential siting visualisation. Rainwater tanks and surrounding works are separate from the treatment cabinet.

    Technical evidence

    Independent product evidence

    The Aqua Clarus M800sx is supported by NSW Health accreditation DGTS012 for domestic greywater treatment.

    WCTNZ® designs the complete reuse arrangement around non-potable water identification, drinking-water protection, collection, storage, delivery and the property's wastewater requirements.

    Care and servicing

    Keep the system performing as intended

    Reliable greywater reuse depends on simple owner checks and regular professional servicing across the collection device, treatment cabinet and reuse equipment.

    Typical care and servicing
    Owner observationsKeep an eye out for alarms, leaks, unusual odours or changes in operation, and keep service access clear.
    Collection and primary filtrationInspect and clean the upstream collection filter at the intervals set for the installed collection device.
    Professional servicingScheduled professional servicing covers the treatment process, membrane, UV, pumps, blower, alarms and the system's residual-water handling.
    RecordsKeep commissioning information, service reports, parts replaced, relevant readings and water-quality records together with the system documents.

    Regular care protects performance. Routine checks, primary-filter maintenance and scheduled servicing help keep the treatment and reuse system working reliably over the long term.

    Common questions

    What customers often ask

    What does “AU Level 1” mean?

    AU Level 1 is a high treated-greywater quality target. For the M800sx, that means BOD below 10 mg/L, TSS below 10 mg/L and E. coli below 1 cfu/100 mL. In familiar NZ treatment terms, the process combines Advanced Secondary treatment with tertiary ultrafiltration and UV disinfection.

    Is a separate diversion or collection device needed?

    Where pumped collection is required, WCTNZ® can pair the M800sx with a GreyFlow collection/diversion device to collect, screen and transfer household greywater to the treatment cabinet.

    Will it treat toilet waste or all wastewater from the house?

    No. The M800sx treats separately collected greywater rather than toilet waste or the home's full wastewater stream. Blackwater and any wastewater not selected for reuse stay on their normal wastewater pathway.

    How much mains water can the system save?

    Savings vary with household water use, the amount of greywater collected and how much treated water can be used for toilets, laundry and irrigation. WCTNZ® can help assess the likely water balance for your property.

    WCTNZ® project enquiries

    Tell us about your property and how you want to reuse water

    Tell us your location, household size, the greywater sources you want to collect and how you would like to reuse the treated water. For new builds or retrofits, a simple site plan or a few photos are usually enough to start the discussion.

    Our team can then help shape the system package, provide pricing and explain the servicing arrangement for your project.

    WCTNZ® sales and project enquiries: 0800 022 027 · sales@wctnz.co.nz

    Copyright © 2026 Waterless Composting Toilets NZ Limited (WCTNZ®). All original WCTNZ® product copy and application content are reserved. All rights reserved.

    Reviewed and approved by Dylan Timney, Managing Director of WCTNZ®.

    Last reviewed: 22 September 2026.