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    Aqua Clarus M800sx | Domestic Greywater Treatment System

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    Brand: Aqua Clarus
    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.
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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, 0.025-micron ultrafiltration 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.

    Discuss your M800sx project View product details
    Aqua Clarus M800sx tall greywater treatment cabinet, product visualisation
    Aqua Clarus M800sx cabinet visualisation.
    Up to 800 L/dayTreated water available for reuse
    Up to 8 peopleHousehold greywater treatment
    AU Level 1 targetFinal treated-greywater quality objective
    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.

    The preferred arrangement pairs the M800sx with a 100-litre GreyFlow PRO collection unit. The treatment controller operates the transfer pump to manage the incoming greywater flow.

    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

    A typical household system can collect greywater from showers, baths, handbasins and normal washing-machine discharge. Kitchen sinks and dishwashers can also be included where the system design incorporates a correctly sized and maintained grease/solids trap upstream of the GreyFlow collection and filtration stage. Toilet waste and roof runoff remain 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

      A collection tank is the preferred feed arrangement. The M800sx controller operates the transfer pump, with an inlet flow of around 20 litres per minute and a maximum instantaneous feed rate of 20 litres per minute.

    2. Biological treatment

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

    3. 0.025-micron ultrafiltration

      Following biological treatment, water passes through the 0.025-micron ultrafiltration membranes, adding a physical filtration barrier before UV disinfection.

    4. Ultraviolet disinfection

      The filtered water passes through a 25 W UV unit before entering the internal treated-water tank. A UV failure activates a red light and buzzer and stops discharge from the treatment unit until the fault is resolved.

    5. Store and deliver for reuse

      The cabinet has approximately 25 litres of temporary treated-water storage, also used for membrane backwash. An external treated-water tank is recommended, with delivery and backup arrangements selected for the intended reuse.

    Treatment quality

    AU Level 1 quality target with tertiary ultrafiltration and UV

    Biological treatment, ultrafiltration and UV disinfection work together to produce treated greywater for non-potable reuse. The water-quality targets below apply at the final outlet, after the complete treatment process.

    AU Level 1 quality target

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

    Advanced-secondary quality objective

    The complete system targets advanced-secondary organic and solids quality, with tertiary ultrafiltration and UV disinfection. The quality objectives apply to water leaving the complete system.

    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
    Rated reuse outputUp to 800 litres per day of treated greywater available for reuse; actual output depends on the suitable greywater collected and operating conditions
    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
    Dry weight160 kg empty
    Electrical supply240 V AC, 10 A
    Core treatmentBiological trickle-bed treatment, ultrafiltration and UV disinfection
    Membrane pore size0.025 micron (0.025 µm)
    UV unit25 W, with a quartz sleeve
    Treatment qualityAU Level 1 final-water target: BOD <10 mg/L, TSS <10 mg/L, E. coli <1 cfu/100 mL; turbidity target <1 NTU
    Treated-water deliveryApproximately 25 litres of internal temporary storage, also used for membrane backwash; external treated-water storage is recommended
    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
    Preferred collection arrangementGreyFlow PRO; 100-litre collection capacity described for the M800sx pairing
    Feed control and rateTransfer pump operated by the treatment controller; typically around 20 L/min, with a maximum instantaneous inlet rate of 20 L/min
    Service clearances800 mm in front, 500 mm on the right-hand side and 500 mm above the cabinet
    Holiday modeIntermittent circulation for absences longer than one week
    Alarms and discharge protectionHigh-level and UV alarms; UV and pump-float faults stop discharge from the treatment unit
    Remote monitoringAvailable as an optional extra

    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 equipment accessible for servicing. Allow 800 mm in front, 500 mm on the right-hand side and 500 mm above, together with a suitable level base, restraint, electrical isolation and connection access.

    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.

    Our team helps plan the collection, storage and reuse arrangement for your property, including non-potable water identification, drinking-water protection and the appropriate wastewater connections.

    Care and servicing

    Keep the system performing as intended

    Reliable greywater reuse depends on regular care across the collection device, treatment cabinet and reuse equipment. Aqua Clarus allows trained owners to service their systems with written authorisation; a service provider is also an option. Electrical faults require specialist attention.

    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.
    System servicingCheck the biological process, membrane, UV, pumps, blower and alarms under the manufacturer’s service instructions. An authorised, trained owner or a service provider can carry out the agreed service scope; electrical faults remain specialist work.
    Membrane careClean at six-monthly intervals using the manufacturer’s specified procedure
    UV careReplace the lamp annually and clean the quartz sleeve during servicing
    Blower careCheck operation and clean the blower filter annually
    RecordsKeep commissioning information, service reports, parts replaced, relevant readings and water-quality records together with the system documents.

    Regular care protects performance. These component tasks form part of the servicing plan for the installation. Keep service records and follow the manufacturer’s instructions for cleaning, checks and replacement parts.

    Common questions

    What customers often ask

    What does “AU Level 1” mean?

    AU Level 1 is the greywater-quality target for the complete system. The final-outlet targets are BOD below 10 mg/L, TSS below 10 mg/L and E. coli below 1 cfu/100 mL, with a turbidity target below 1 NTU. Biological treatment is followed by tertiary ultrafiltration and UV disinfection; the treated water is for non-potable reuse.

    Is a separate diversion or collection device needed?

    GreyFlow PRO collection and controlled pumped transfer is the preferred arrangement. Gravity feed may suit small households producing less than 400 litres of greywater per day, after checking the site levels and feed arrangement with the supplier.

    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.

    What should I do when we go away?

    Activate the holiday-mode switch on the alarm panel when the home will be vacant for more than one week. It runs short circulation periods to protect the biological bed and help prevent odours. Leave the system powered for holiday mode and switch the mode off when you return. A system that has been completely shut down needs its restart requirements checked separately.

    What happens if the UV fails?

    A red light and buzzer indicate the UV fault, and the treatment unit stops discharging water until the fault is resolved. Pump-float faults also stop discharge. Contact your service provider and do not bypass the protection controls.

    When can a newly installed system start supplying reuse water?

    Allow an initial biological establishment period. Aqua Clarus recommends discharge to sewer for a couple of weeks where possible before sending water to reuse storage. The startup discharge route and readiness checks are arranged during commissioning.

    Can I service the system myself?

    Aqua Clarus permits owner servicing after training and written authorisation for the agreed work. You can also use a service provider. Follow the manufacturer’s procedures, keep records and leave electrical fault work to qualified personnel.

    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.

    Request project information & pricing Email WCTNZ®

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

    Related information
    About greywater Choosing a greywater system Domestic greywater treatment systems

    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.

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