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Underground Tank Carat S
Underground Tank Carat S
Underground Tank Carat S
Underground Tank Carat S
Underground Tank Carat S

    Underground Tank Carat S

    The new tank generation of Carat rainwater underground tanks has been specially developed for rainwater harvesting. Easy to transport due to low weight and encircling H profile.

    Logistical advantages of the Carat S tank

    The Carat S tank consists of two half shells which can be piled on top of each other, allowing multiple tanks to be stacked on a single pallet for shipping. For example, it is possible to stack five 6,500 ltr Carat S tanks, or nine 2,700 ltr Carat S tanks on a single pallet. This allows a standard 40 ft. shipping container to house a total tank volume of up to 130,000 ltrs! The tanks unique stacking feature reduces transport costs and environmental impact from vehicle emissions, whilst allowing shipments to any destination in the world.

    Easy and safe assembly

    • The patented quick connection (illustrated in green), allows the Carat S tank to be assembled without screws in only few minutes. Disassembly is possible at any time.
    • The first-class EPDM material used in the profile sealings (illustrated in yellow), has been laboratory tested. It lasts more than 25 years.
    • The centering bolt (illustrated in orange) assures the accurate and easy assembly of the two half shells preventing any leaks

    More advantages

    • Highest stability and unique fitting accuracy thanks to new production processes
    • Consistent quality due to constant production monitoring
    • Suitable for vehicle loading (when combined with the Telescopic cast iron cover)
    • Groundwater-stable up to the middle of the tank thanks to the extremely stable construction
    • Can be expanded as often as required
    • "USA Patent 7854338"

    Application:

    • Global innovation – the new generation of the Carat rainwater underground tanks has been specially developed for rainwater harvesting
    • The Carat tank can be individually tailored to your needs as a garden or house tank using the modular system
    • For frost-proof installation in the ground
    Specification
    • Carat S underground tank

      Carat S underground tank, lorry-bearing up to LKW12, made from the high-quality material Duralen®, 100 % recyclable. 8 connection possibilities DN 100/150 (4”/6” pipe) – 5 prepared with lip seals DN 100 (4” pipe). Large dome shaft (360° turnable) according to DIN 1989. Access Ø 800/650 mm (31.5”/25.6”), height = 610 mm (24”). Sealed up to the top edge of ground using a telescopic dome shaft and profile seal. Certified of stability and watertightness according to DIN EN 12566-3.

      Tank volume : 2700 - 6500 liters (US gal.)

      Product: GRAF Carat S underground tank

      Volume [l] Length [mm] Width [mm] Height [mm] Weight [kg]
      2700 2080 1565 2010 120
      3750 2280 1755 2200 150
      4800 2280 1985 2430 185
      6500 2390 2190 2710 220
    Technical specification
    • Unique ref.Underground-Tank-Carat-S
    • TypeObject (single object)
    • Date of publishing2026-03-19
    • Edition number1
    Related
    • Designed inGermany
    • Manufactured inGermany
    Classification
    • BIMobject CategoryEngineering & Infrastructure - Water

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