A water supply assembly (1) for laundry washing machines (100) provided with a detergent drawer (115) structured for receiving a given amount of detergent, softener or other washing agent and fitted in an extractable manner into a corresponding drawer housing (116). The water supply assembly (1) structured for selectively pouring the water arriving from the fresh-water supply circuit (108) of the laundry washing machine (100) into the detergent drawer (115) so as to selectively flush the detergent, softener or other washing agent out of the same detergent drawer (115).
