Plumbing; Drainage services; Installation, maintenance and repair of roofing and gutters; Gas fitter services and maintenance of gas works; Installation, maintenance and repair of back flow prevention seals; Installation, maintenance and repair of thermostatic mixing valves (TMV), hot water services, fire hydrants and hose reels; Installation, maintenance and repair of fire alarms and fire protection sprinkler systems; Maintenance of plumbing and drainage installations; Maintenance of roofing and guttering; Maintenance of gas works; Unblocking of drains; Drain camera repair; Detecting plumbing and drainage installations for repair or maintenance purposes; Installation, maintenance and repair of heat pumps; Installation, maintenance and repair of sewerage treatment plants; Installation, maintenance and repair of water filtration systems; Installation, maintenance and repair of storm water systems; Installation, maintenance and repair of solar hot water systems; removal of tradewaste (cleaning); Installation, maintenance and repair of grease traps; Commercial hydraulic and plumbing services; Industrial hydraulic and plumbing services

Bitumen; plasterboard; gutter pipes not of metal; water-pipes, not of metal; water-pipe valves, not of metal or plastic; drain pipes not of metal; drain traps (valves), not of metal or plastic; pipes (penstock), not of metal; plastic building materials in the form of tubes, boards, poles and bars; building glass; binding agents for making briquettes; statues of stone, concrete or marble; refractory construction materials, not of metal