Out of the box, AutoCAD MEP 2026 toolset includes sample sizing tables for supply lines and sanitary lines, based on typical industry standards. Supply plumbing line sizing tables specify the equivalent plumbing line length values for fittings and valves. Sanitary plumbing line sizing tables specify the maximum allowable fixture unit loads for different types of sanitary runs (stacks, branches, and offsets). You can also customize the sizing tables to meet your project requirements or conform to applicable codes.
You can also use the plumbing line slope tool to compute the start elevation, end elevation, or slope of a plumbing line based on the starting or ending points in the run. The software prompts for one of three entries — starting point of the segment, ending point, or slope. For more information, see Calculating the Slope of a Plumbing Line.
