11 Lighting installations; heating installations; refrigerating installations; desalination units; water desalination plants; ventilation installations; air conditioning installations; water filters; separators for the cleaning and purification of gases; incinerators; heat accumulators; cooling and freezing apparatus, namely, cooling filter; water treatment apparatus and installations, namely, purifiers, filters, separators and cleaners for the use in purification of water; distillation apparatus and columns not for scientific purposes; flues for heating boilers; pressure regulators for water and gas installations; safety accessories for gas pipes, namely, flashback arrestors and reverse flow check valves; regulating accessories for water supply, namely, metered valves; installations relating to membrane filtration technology, namely, membrane filter modules and membrane filter cartridges all being filtering apparatus for separation and purification of gases, air and liquids; filtering apparatus for liquids, gases and air, incorporating compound filter membranes for industrial, biotechnological, pharmaceutical, medical and scientific purpose; apparatus for use in purification of fuels and biofuels, including ethanol, fuel gas, fuel oil and mineral fuel; apparatus incorporating membranes for use in purification of fuels and biofuels, including ethanol, fuel gas, fuel oil and mineral fuel; apparatus for use in purification of air and of water; separators and membrane filters for the cleaning and purification of gases; gas separation membranes being part of separators for the cleaning and purification of gases; apparatus, namely purifiers, filters, separators and cleaners, for the supply and filtering of water, fuels and organic compounds; apparatus for effluent treatment, namely, purifiers, filters, separators and cleaners; none of the foregoing goods being water pumps