11
Drinking water supply apparatus; Water supply installations; Cisterns; Filters for sanitary water distribution apparatus; Filters for drinking water; Water purification, desalination and conditioning installations; Sewage purification facilities for use with water closets in private homes, office buildings, apartment buildings and public buildings
19
Drain pipes; Rain traps, not of metal; Storm manholes [concrete drainage structures]; Plastic pipes for plumbing purposes; Plastic conduits for drainage; Plastic conduits for irrigation; Ducts (installations of -) [non-metallic, non-electric]; Water-pipes, not of metal
35
Import-export agency services; Commercial information and advice for consumers in the choice of products and services; Provision of an online marketplace for buyers and sellers of goods and services; Retail services in relation to horticulture products; Retail services in relation to water supply equipment; Retail services in relation to earthmoving equipment; Retail services in relation to sanitation equipment; Retail services in relation to toiletries
37
Drainage services; Excavation services; Pipe installation services; Construction of sewerage systems; Advisory services relating to the construction of buildings and other structures; Plumbing
40
Waste water treatment; Water treatment and purification; Providing information relating to water treatment; Water treating