Flushometers; Showers; Spigots; Anti-splash tap nozzles; Apparatus for filtering drinking water; Bath tubs for sitz baths; Cocks for pipes and pipelines being parts of sanitary installations; Drain structures for use in spas, steam rooms and baths; Mixer faucets for water pipes; Mixer taps for water pipes; Plumbing fittings, namely, bibbs; Plumbing fittings, namely, couplers; Regulating accessories for water or gas apparatus and pipes; Shower enclosures; Showers and shower cubicles