Sprinkler Design System

Where can I find sample drawings or DWG files for Special Fire Protection Systems?
1.Preaction Sprinkler & Nozzles
2.Wet-pipe & Nozzles
3.Wet-pipe Sprinkler & Nozzles
4.Single Wet-pipe AFFF Sprinkler Riser
Also, which software is better for 2D and 3D modeling?