A flushing apparatus, suitable for being positioned in at least one housing on a toilet bowl, said flushing apparatus comprising at least one outer body for being mounted on the toilet bowl, at least one inner body mounted inside the outer body , at least one entirely open side conduit and at least one partially open and partially closed side conduit positioned on the inner body in a mounted state respectively in the right and left sides with respect to a center of the inner body , at least one middle conduit positioned between the entirely open side conduit and the partially open and partially closed side conduit in a lower section of the inner body in a way to be disposed in line with the inner body center and at least one cover positioned on the inner body , characterized in that • of said side conduits, the partially open and partially closed side conduit comprises both one side conduit open portion that is open to the passage of water and one side conduit closed portion that is closed to the passage of water wherein the side conduit open portion has a surface area smaller than that of the other entirely open side conduit that is entirely open to the passage of water, • the side conduit open portion , which is open to the passage of water, of said partially open and partially closed side conduit has a surface area in the range of 80-100 mm 2 and the other entirely open side conduit , which is entirely open to the passage of water, has a surface area in the range of 240-300 mm 2 , and • the flushing apparatus comprises an asymmetric guide with asymmetric structure on the inner body , wherein the asymmetric guide has one portion in the section with the partially open and partially closed side conduit that is inclined in a way to guide the incoming water towards the side conduit open portion , and another portion in the section with the entirely open side conduit that is inclined in a way to guide the water towards the lower portion of the conduit that is open. • of said side conduits, the partially open and partially closed side conduit comprises both one side conduit open portion that is open to the passage of water and one side conduit closed portion that is closed to the passage of water wherein the side conduit open portion has a surface area smaller than that of the other entirely open side conduit that is entirely open to the passage of water, • the side conduit open portion , which is open to the passage of water, of said partially open and partially closed side conduit has a surface area in the range of 80-100 mm 2 and the other entirely open side conduit , which is entirely open to the passage of water, has a surface area in the range of 240-300 mm 2 , and • the flushing apparatus comprises an asymmetric guide with asymmetric structure on the inner body , wherein the asymmetric guide has one portion in the section with the partially open and partially closed side conduit that is inclined in a way to guide the incoming water towards the side conduit open portion , and another portion in the section with the entirely open side conduit that is inclined in a way to guide the water towards the lower portion of the conduit that is open. <EOS>