How to answer
As you may know, there is some debate between PVC and copper for the use in water mains. Be sure to pick a side and then explain your answer.
"I prefer copper pipes as I feel that PVC isn’t always the safest choice. Many people are concerned that the chemicals used in the production of CPVC may cause health issues when exposed to heat. I find copper to be a safer choice especially when there will be consumption of water from those pipes."