I'm all for more accuracy in the Revit MEP model, and Victaulic has made this much easier in regards to creating grooved piping layouts. They've created Revit .RFA families and lookup tables for fittings, valves, etc. and posted them on their website. So if you're looking at grooved piping for IPS, fire protection and more, check out this website:
I've downloaded the whole thing, and will be testing them out on my next project.
Check it out - David B.