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Hot water installation contractors, legionella protected systems for public buildings
Plumbing and sanitary installation and repair contractors, domestic
Plumbing installation contractors, industrial
Pipework and plumbing installation contractors, marine
Space heating installation contractors, radiant, hot air and gas
Cleaning contractors, ventilation ducting
Dust extraction systems, design, installation and maintenance
Cleaning contractors, local exhaust ventilation (LEV) systems
Cleaning contractors, extractors for catering and institutional kitchens
Remote monitoring contractors for refrigeration plant
Leakage detection and location services, pipelines
Maintenance and reconditioning services, sanitary and heating equipment
Resurfacing services, in situ, for baths and sanitary ware
Conversion services, industrial gas powered equipment to natural gas
Pipe fittings
Electric motor
Automobiles
Cartridges, carbon dioxide
Ethane
Fluorine gas
Hexane
Hydrofluorocarbons, chlorofluorocarbon (CFC) replacement
Hydrogen bromide
Hydrogen fluoride
Hydrogen iodide
Hydrogen phosphide/phosphine
Isobutane
Krypton
Ozone
Propylene
Sulphur dioxide, compressed or liquefied
Tear gas
Xenon
Compressed and liquefied gases, pure
Gases, high purity
Inert gas mixtures for modified atmosphere food packaging
Calibration gases
Laser gases
Butane
Butadiene
Air, compressed
Air, liquefied
Butylene
Carbon dioxide, solid/dry ice
Carbon monoxide
Propane
Chlorofluorocarbons (CFC)
Chlorofluoroethanes
Chlorofluoromethanes
Cyclopropane
Argon
Helium
Neon
Medical gases
Hydrogen
Nitrogen
Oxygen
Carbon dioxide
Nitrogen oxides
Oxygen for medical use
Refrigerating gases
Semiconductor gases
Aerosol propellants, fluorinated hydrocarbons
Methane
Ethylene
Chlorine
Gas generation equipment
Ammonia
Hydrogen peroxide
Hydrogen chloride
Acetylene
Hydrogen sulphide
Compressors and allied equipment
