Plumbing deals with the laying of pipelines. Pipeline provides the means of transporting fluids. It is obvious that laying out the pipeline requires a number of joints to be made and a number of valves incorporated.

Plumbing work does not require many tools except pipe wrenches, hacksaw, pipe-cutter, threading equipment and pipe-vices.

Sheet metal work is working on metal sheets of 16 to 30 gauges, with hand tools and simple machines in order to convert the sheets into different forms.