Regional pipelines

The regional pipelines consist of rising main component varying from 100mm to 800mm diameter rising mains that link the four pump stations, to the treatment, the biosolids pipeline, and the 1,200 diameter airfall pipeline and two diffuser pipelines.

Statistics about the rising mains
Main Type Length - km Base Service Life (years) Residual Life (years) at 2006
PE 11.08 80 75 - 80
Concrete 4.41 34 10
Steel .04 80 79
  15.53