Abstract: 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.

Abstract: A method for determining the point in time for the replacement of one or more of wearing parts, blocking fluids and fragrance and cleaning substances, dependent on the use of a sanitary apparatus, includes the step of placing an indicator element in the run-out region of the sanitary apparatus, which indicator element has an optically recognizable chemical or physical conversion indicator that provides an observable conversion after a predetermined, or pre-set, number of uses, or wettings, of the sanitary apparatus for altering maintenance personnel that maintenance of the sanitary apparatus is required. An apparatus for performing the method is also provided.

Abstract: 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.