Hydraulic Modelling
I came across a reference to some software called EPANET the other day in a design report. Having done a little digging to find out what it is I thought it may be useful to the other E&M’s (or Civil’s) out there. It allows the modelling of water distribution piping systems, including junctions, valves, pumps and storage. As well as doing the standard hydraulic checks based on Hazen-Williams, Darcy Weisbach or Chezy-Manning formula, it can do model time based movement through the system allowing the modelling of residual chlorine amongst other things. It sounds impressive and what’s more it was developed by the United States Environmental Protection Authority, so its free. I haven’t had the chance to experiment with it yet, but it has apparently been used quite a bit on some of the Melbourne Water projects by various members of the KBR team.
http://www.epa.gov/water-research/epanet

EPANet is a very useful tool Matt, as you highlight. There’s a link to this sotfware, amongst others, on the E&M portion of the ELE in the “Computer Aided Engineering” module.
On a wider note the US offering of software is worth a look, there are a variety of packages available that are free to use (non commercially). Its also worth reinforcing that the Bentley StudentServer has 50 commercial software titles for you to explore, the Bentley equivalent of EPANet is WaterCAD which is more sophisticated ie harder to use.