A valve (9) for integrating into a sanitary appliance e.g. a urinal (1), including two lug-type elements (21) that are arranged parallel to each other on the lower end of a funnel-shaped inflow section (17). The elements (21) are interconnected on the ends of the lower edge (23). Slits (33) can also be made in the elements (21), enabling the escape of liquid when there is a large amount of throughflow.