Abstract: A gutter for an evaporative panel of a cooling system having at least one channel with a bottom wall, a pair of opposing side walls ending at the top edges of the channel, at least one joint connecting one end of the channel to another component of the evaporative panel, the joint comprising, an outer part for coupling to an outer surface of the channel and having a pair of flanges to be arranged at the respective top edges of the channel, an inner part for coupling to an inner surface of the channel and having a pair of flanges to be arranged at the respective top edges of the channel, at least one gasket to be interposed between the inner part of the joint and the inner surface of the channel, and clamping to clamp the end of the channel between the inside and outside parts of the joint.