construction
          - Wastewater drainage
          - Soil and waste floor drainage
          - Gutter systems for rainwater drainage
          - Pressure system piping
          - Sewage system piping

public works
          - Supply networks
          - Sewerage networks
          - Gas pipelines
         -  Drainage
          - Electrical and telecommunications ducting

irrigation
          - Pressurised networks
          - Agricultural installations
          - Trickle irrigation networks