11
Apparatus or installations for water supply purposes or sanitary purposes; Filters for industrial and household use; Water filtering apparatus for industrial use; Water filtering apparatus for domestic use; Filters for water purifiers; Filters for use with apparatus for sanitary purposes; Filter apparatus for water supply installations; Filter boxes for water purification; Apparatus for filtering drinking water; Water filters; Water filtering installations; Water treatment filters; Water purification, desalination and conditioning installations; Apparatus for descaling water; Ion exchange installations; Cartridge filtration units [water treatment equipment]; Membrane filtration units for water treatment apparatus; Membrane purifying apparatus for the purification of water; Water purification units; Tap-water purifying apparatus; Water filtering apparatus; Water purifying units for producing potable water
37
Plumbing installation, maintenance and repair; Plumbing installation advisory services; Plumbing maintenance advisory services; Plumbing repair advisory services; HVAC (Heating, ventilation and air conditioning) installation, maintenance and repair; Repair of water purifying apparatus; Water supply installations maintenance
42
Engineering consultancy services; Chemistry consultation; Technological consultancy