6
Manholes of metal; Drain pipes of metal; Water-pipes of metal; Industrial water tanks of metal; Manhole covers of metal; Junctions of metal for pipes; Pipes, tubes and hoses, and fittings therefor, including valves, of metal; Pipes and tubes of metal for aqueducts, filters of metal being parts of pipes and tubes for aqueducts; Tubes of metal; Pillars of metal; Shaft covers of metal; Pipe fittings [junctions] of metal; Drain pipes of metal; Ducts made of metal for trunking pipes for gases; Ducts made of metal for trunking pipes for liquids
7
Machines for drilling wells; Core drilling bits; Filtering machines; Screening machines; Sifting machines; Diaphragm pumps for pumping liquid material; Pumps for the extraction of liquids [machines]; Water sampling pumps
9
Apparatus for capturing gas
11
Water filters; Water filtering apparatus; Filters for wastewater; Filters for gas extractors; Filters for exhaust extractors [parts of household or industrial installations]; Strainers for water lines; Filters for industrial and household use; Filters for use with apparatus for water supply; Water filtering installations; Filter elements for the air vents of water supply tanks; Membrane filtration units for water treatment apparatus; Regulatory fittings for water pipes; Stop valves being safety apparatus for water apparatus; Biogas scrubbing apparatus; Wastewater purification units; Heating rings
17
Flexible hoses, not of metal; Flexible pipes, tubes, hoses and fittings therefor (including valves), and fittings for rigid pipes, all non-metallic; Non-metallic couplings for pipes; Non-metallic insulated pipes; Non-metallic couplings for tubes; Pipe spacers (Non-metallic -); Seals for pipe connections; Tube junctions (Non-metallic -); Rubber tubes and pipes; Junctions, not of metal, for pipes; Pipe connections (non-metallic -) [parts of rigid water pipes]; Plastic plumbing hoses; Flexible plastic pipes for conveying natural gas; Rubber stoppers; Membranes and semi-processed synthetic filtering materials; Water-tight rings
19
Shaft covers, not of metal; Plastic conduits for drainage; Drains [other than of metal or plastic]; Sumps (non-metallic -) [structures]; Drain pipes, not of metal; Rigid underdrainage pipes, not of metal; Water-pipes, not of metal; Water-pipe valves, not of metal or plastic; Drain gullies, not of metal; Inspection covers of non-metallic materials; Rigid pipes and valves therefor, non-metallic; Pipes and tubes, not of metal for aqueducts, filters, not of metal being parts of pipes and tubes for aqueducts; Rigid pipes of plastic for aqueducts, filters of plastic being parts of pipes and tubes for aqueducts; Rigid pipes, not of metal; Drainage courses (Non-metallic -); Insulated pipes (Non-metallic -) for water; Drain pipes; Plastic pipes for conveying natural gas; Ducts made of plastics for trunking pipes for gases; Branching pipes, not of metal
42
Engineering design services for environmental monitoring and remediation; Design of facilities for environmental monitoring and remediation; Design of filtering systems; Providing wellbore mapping services; Inspection of artesian wells; Design of artesian wells; Technical design and planning of pipelines for gas, water and waste water