This gutter is equipped with an extra large draining channel. Its closed box construction ensures that no debris falls into the gutter. The recycled water is stored in the drainage channel and drained away in darkness so as to prevent algal growth. This gutter has a large span measuring up to six metres. The mat is locked between the two raised edges of the gutter so that it remains stable. The shape of the gutter means that drainage water can be drained away completely separately. The gutter does not contain any sharp edges, so plants and fruit are protected from damage. The closed box gutter can be constructed in almost all widths and heights ranging from 120 mm to 350 mm. It is multifunctional and can be used in any crop.