[ Air filtering installations; Air purifying apparatus and machines; Automatic flush valves for toilets; ] Bath installations; [ Baths, bathtubs, whirlpool baths and bath installations; Clean room installations; Clean rooms; ] Filters for drinking water [ ; Flexible pipes being parts of bath plumbing installations; Flush handles for toilets; Flushometer valves; Flushometers; Hand basins being parts of sanitary installations; Mixer taps for water pipes; Purification installations for sewage; S...