Water Quality Awareness 101 9 | P a g e Working in a dirty environment – highlights the importance of cleaning clothes and footwear  Reuse of fittings and piping that have previously been used in other applications (e.g. sewage systems)  Contamination of tools, equipment and spare parts that may have occurred off site or in transit to the repair job. Storage within a supplier’s premises cannot guarantee that the materials are currently fit for drinking water use Poor pipe management - note ingress of soil and foreign matter into open pipe ends