A washing machine, comprising: a washing tub, for a washing fluid comprising water and one or more detergent substances to be delivered in said tub; an outlet conduit connected by an end portion to the tub, for conveying said washing fluid out of said washing machine; a recirculation circuit comprising a first conduit, a recirculation pump and a second conduit, wherein: said first conduit connects said outlet conduit, to said recirculation pump; said second conduit allows connection between said recirculation pump and said tub; said recirculation pump is designed to draw said fluid from said tub through said first conduit and to feed said fluid back into said tub through said second conduit and said second conduit has a first end connected to said recirculation pump and a second end leading to said tub, characterised in that said recirculation circuit includes a removable insert mounted at said second end of said second conduit, said insert being designed to divert the fluid flow that comes out of the second conduit substantially by 90° and to convey the flow substantially parallel to the bottom of the tub so that any detergent accumulated on the bottom of the tub itself may be hit by this flow and being then reactivated. a washing tub, for a washing fluid comprising water and one or more detergent substances to be delivered in said tub; an outlet conduit connected by an end portion to the tub, for conveying said washing fluid out of said washing machine; a recirculation circuit comprising a first conduit, a recirculation pump and a second conduit, wherein: said first conduit connects said outlet conduit, to said recirculation pump; said second conduit allows connection between said recirculation pump and said tub; said recirculation pump is designed to draw said fluid from said tub through said first conduit and to feed said fluid back into said tub through said second conduit and said second conduit has a first end connected to said recirculation pump and a second end leading to said tub, characterised in that said recirculation circuit includes a removable insert mounted at said second end of said second conduit, said insert being designed to divert the fluid flow that comes out of the second conduit substantially by 90° and to convey the flow substantially parallel to the bottom of the tub so that any detergent accumulated on the bottom of the tub itself may be hit by this flow and being then reactivated. said first conduit connects said outlet conduit, to said recirculation pump; said second conduit allows connection between said recirculation pump and said tub; said recirculation pump is designed to draw said fluid from said tub through said first conduit and to feed said fluid back into said tub through said second conduit and said second conduit has a first end connected to said recirculation pump and a second end leading to said tub, characterised in that said recirculation circuit includes a removable insert mounted at said second end of said second conduit, said insert being designed to divert the fluid flow that comes out of the second conduit substantially by 90° and to convey the flow substantially parallel to the bottom of the tub so that any detergent accumulated on the bottom of the tub itself may be hit by this flow and being then reactivated.