I am new to create geometric networks and I cannot find a decent explaination of how they are created. I can follow the directions in the help section but I don't quite understand how weights work. I have 5 feature classes I am going to include manholes, gravity and pressurized mains, lift and pump stations. Does each feature class need a weight set to it? When I did get the network to work I could not figure out how to fix the errors either. I need to set up the geometric network so our maps will show flow direction. I plan on setting this up in the water and storm sewer systems as well. Any additional help would be greatly appreciated.