Manifold Fire Water Connection Design

I have an operating manifold facility and now need to tap into its header for a new wet-pipe fire-water system. I already hold complete, up-to-date P&IDs, GA drawings, and utility layouts, so the focus is purely on engineering the connection itself rather than re-surveying or onsite supervision... (Budget: $250 - $750 USD, Jobs: AutoCAD, CAD/CAM, Civil Engineering, Engineering, Mechanical Engineering)