<< Click to Display Table of Contents >> Navigation:  Wadiso 6 User Guide > Optimization > Optimization technique and general concepts  > Pipe cleaning as an alternative to adding new pipes

If an existing system can no longer meet the pressure requirements for a present or projected water demand, one option for reinforcing the system is to add new pipes. If the existing system includes rough pipes (e.g. with low Hazen-Williams coefficients), however, it may be more economical to clean and line the old pipes or clean some of the old pipes and add some new pipes. The enumeration algorithm can easily handle the evaluation of these alternatives.