The overflow trap is composed of a polypropylene tube with a length of 70 cm, having an automatic system with a double sealing gasket at the bottom of the tub, an elbow to stop the smell from the sewer with a 40 mm outlet and thread with nut for connection with the flexible tube or fixed pipe. By turning the masking cover of the overflow, the sealing plug of the siphon rises or falls according to the user's preferences.