Aquarium filtration apparatus; Disinfectant apparatus for medical purposes; Disinfectant dispensers for toilets; Filters for drinking water; Filters for air extractor hoods; Pasteurizers for use in the food, beverage, pharmaceutical industry; Sewage purification installations; Water filtering apparatus; Water purification installations; Water purifying apparatus and machines; Water softening apparatus and installations; Water sterilizers; Air sterilizers; Plug-in diffusers for air deodorizers...