Converting 'dumb' utility polylines to Feature Lines, quickly grading them using SETFEATUREGRADE Command, dropping them to the appropriate cover depth, projecting them into Profile View to also grade any 'dips' or high points for ARVs, etc. and then creating a Pipe Network with Null structures at vertices using said Feature Line works pretty well, actually, IMO.
In the same drawing, I've done this now a few times, for proposed Force Main, future Water Main, future Reuse Main, and now proposed Water Main.
For some reason, the respective Pipe Network's Null structures, with the same Standard Style applied, and on visible/thawed layers, behave differently... Some show up as the 'circle', and others don't show up at all, requiring me to right click select from Toolspace until I find the right one, or simply change them all to a non-Standard Style which uses a Block in plan. Grrr
Sometimes they 'appear' after matching one Pipe Style to another (i.e., Water Main --> Water Main Restrained), others they might 'appear' after I intentionally pull one pipe end away from the location of a Null structure, and then graphically 'reconnect' it - even though they're already connected.
Am I missing something?