water,and,sanitation

Here's a 168 pages of a paper you can read on the subject:

http://sjp.academia.edu/tgifernando/Papers/1009479/Ant_colony_optimization_based_simulation_of_3d_automatic_hose_pipe_routing

can ACO technique be used like genetic algorithm for finding the pipe diameters in loop network??

I have no idea. If you take a look at the document I linked to, it may have the answer for you.

I have no desire to read the 168 pages for you. Sorry.

thanx for d link.