Water purifying apparatus and water purification installations for reverse osmosis applications; water filters, namely, household tap water filters; waste water treatment tanks for industrial purposes; septic tanks for industrial purposes; water filters, namely, reverse osmosis membrane for purification water; water filters, namely, reverse osmosis membrane for purification of sea water; water filters, namely, micro filtration membrane for purification water; disinfectant apparatus, namely, filtering units for disinfecting water; water desalination plants; filtering apparatus, namely, water filtering units for water filters; water filters used in household or industrial or municipal installations; water purifying apparatus and pressure vessels; machines for use in water purification; sterilizers; water softening units, namely, water softening apparatus and installations; oil scrubbing apparatus, namely, oil purifying installations; sewage disposal facility, namely, sewage disposal plants; drinking water apparatus, namely, drinking fountains