PPR vs COPPER for high rise building

[moideen]

The 70-story building, the existing copper pipe for domestic cold-water distribution is deteriorated and water leak issues are rampant. The pipe thickness is 1.2 mm. I recognize the selection of the pipe was wrong and the then project engineer didn’t checked properly when select the copper pipe. We here select 2.5 mm for high rise buildings. I didn’t find any PRV not placed between the main vertical pipes to withstand the gravity pressure. and the piping is laid out in two risers.we planned to retrofit with new pipe. I want to go with PPR. what is your comments on PPR VS COPPER for high rise building? which is best and recommended with high gravity pressure water circuit?

 

[MortenA]

Copper shouldnt just corrode - unless there are other material as well (fitting etc) or if e.g. nails og screws frequently touch the copper.

Pr is more suspectable to water hammer - even if the design pressure is the same.