Abstract: A distribution unit for adding a fiber suspension to an inlet space in a dewatering press is disclosed. The distribution unit comprises a distribution housing, which forms at least one distribution slit intended to be connected to the inlet space of the dewatering press, and at least one inlet member for adding the fiber suspension to the distribution slit. The distribution housing is provided with at least one opening to the distribution slit and a matching hatch for sealing the opening. The hatch is hinged to the distribution housing so that it is pivotable relative to the distribution housing between a first position and a second position. An inlet box is also disclosed comprising a number of the distribution units.