The Quadro 2 - Rectangular Reservoir with Metal Grid and Insert is a strong and sturdy water reservoir which can be used for many types of water features and can be installed in the ground or freestanding. These strong plastic sumps are slightly tapered allowing the top rim to be supported by the surrounding ground. When installed in this way the galvanised steel grid can support a water feature of up to 250 Kg. This kits also feature an inset access cover which allows you to remove and clean your water pump without having to disturb your feature. The grid size is 5cm Square and perfect for large cobbles and fast drainage. If you would like to use smaller aggregate material like gravel or granite chippings a non-rotting water permeable material like greenhouse netting will have to be placed over the grid to stop it falling through. Please note that if it is not possible to support the reservoir lip when installed, the maximum weight limit would be 100 Kg Quadro 2 - Rectangular Reservoir with Metal Grid and Insert Features Extremely strong & weatherproof Includes a galvanised steel grid Support a filled water feature of up to 250 Kg Includes inset access cover 5cm square grid size Quadro 2 - Rectangular Reservoir with Metal Grid and Insert DimensionsExternal : Length: 785mm x Width: 480mm x Height: 325mm Internal : Length: 730mm x Width: 420mm x Height: 315mm Access Plate : 200mm x 200mm Water Capacity: 90 Litres (20 gallons) Optional Auto Fill KitThe Oase Auto Fill Kit is a simple solution for automatically topping up a water feature sump. Evaporation or "splash out" can cause the water level within your water feature to fall over time. With the installation of an Auto Fill Kit which is connected to a mains water supply, small amounts of water can be added at a time reducing the need for manual top-ups.