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    SKU: Uni-ADK230
    The Arch Drain Kit suits most situations where a trench soak-away is required. Compatible with all Nature Loo™ systems, all Clivus Multrum™ systems, Sun-Mar™ Compact, Sun-Mar™ Excels and Sun-Mar™ Centrex systems.

    Choose the Product options below

    Note: If you are using the drain kit for a Sun-Mar™ Centrex Micro-Flush system, you will need a larger drain to deal with the volume of liquid.

    Add one extension for the Sun-Mar™ Centrex 2000 Micro-Flush 240 or NE
    Add two extensions for the Sun-Mar™ Centrex 3000 Micro-Flush 240 or NE

    Availability: Availability - on backorder and will be dispatched once in stock (On back-order – expected in approx. 3–4 months).
    $120.00 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1 week (NZ-wide)
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    Products
    WCTNZ® excess-liquid drainage kit

    WCTNZ® | Standard Arch Drain Kit | 230mm

    Complete arch-drain package for managing excess liquid from compatible waterless composting toilet systems through a site-appropriate absorption trench.

    Designed as a practical drainage pathway for Nature Loo™, Clivus Multrum™ and selected Sun-Mar™ systems where excess liquid needs to be carried away from the composting unit into an appropriate land-disposal area.

    Arch height
    230mm
    Standard drain arch
    Arch length
    1200mm
    Single trench section
    Feeder pipe
    50mm DWV
    700mm supplied
    Application
    Leachate
    Excess-liquid drainage
    Compatibility

    Designed for compatible composting-toilet drainage systems

    • Nature Loo™ composting toilet systems.
    • Clivus Multrum™ composting toilet systems.
    • Sun-Mar™ Compact.
    • Sun-Mar™ Excel models.
    • Sun-Mar™ Centrex systems.
    EcoLet™ Separera: for EcoLet™ Separera urine-diversion applications, see the WCTNZ® Soak Pit Kit 400 .
    Package includes

    Standard Arch Drainage Kit

    Drain arch
    1 × 1200mm drain arch with 230mm arch height.
    End caps
    2 × drain arch end caps.
    Geotextile
    1 × geotextile section.
    Feeder pipe
    1 × 700mm long 50mm PVC DWV pipe.
    Threaded fitting
    1 × 50mm threaded fitting.
    Bends
    2 × 45° 50mm elbows.
    Drainage pathway

    Absorption trench or alternative liquid management

    The correct excess-liquid pathway depends on soil permeability, groundwater conditions, site layout and applicable local requirements.

    Absorption trench
    The normal land-disposal pathway where the site has suitable soil and groundwater conditions.
    Holding tank
    Can be considered where liquid needs to be retained for later removal, including selected mobile applications.
    Alternative connection
    In some projects the excess-liquid drain may instead connect to an appropriate greywater or alternative approved disposal pathway.
    Installation context

    Soil, groundwater and loading determine the final trench

    • Position the trench where the soil has suitable permeability.
    • Avoid locations where groundwater can flood the trench or composting unit.
    • Poorer-permeability soils may require additional disposal area or trench length.
    • Additional wastewater flows connected to the same disposal area can increase the required land-application capacity.
    • The supplied product guidance uses approximately 1 litre per resident per day as a planning figure for excess liquid leaving the composting toilet under normal use.
    Site-specific design: trench dimensions, setbacks and construction should be confirmed for the actual site. The original WCTNZ® product guidance references AS/NZS 1547:2012 for land-application design; local consent and site requirements may also apply.
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