Autodesk 235B1-05A761-1301 User Guide - Page 495

Friction Loss-Water Meter If a water meter is included in your design, then you should account for the total friction loss of the water meter. A water meter is considered part of the water utility. Typically it is not a part of the building. Often it is not included in the design. Therefore, the default value is 0 psi. Hazen-Williams C-factor The C-factor determines the friction loss of the run using the Hazen-Williams formula. The factor "C" is known as the "Hazen-Williams C" or "friction loss coefficient C." The C-factor relates the relative roughness of the interior wall of the pipe and varies between different types of pipe. The C-factor is typically 100 for steel pipe and 130 for brass and copper. The default value used in sizing supply plumbing lines is 100. Customizing Plumbing Content Typically, CAD managers and other users create plumbing content. AutoCAD MEP provides 2 types of plumbing content: ■ Style-based content refers to 2D objects that are defined by styles. Styles are sets of properties and associated view blocks. In plumbing drawings, style-based content includes plumbing lines, plumbing fittings, and schematic objects for schematic diagrams. ■ Catalog-based content refers to 3D objects that are defined by part definitions and associated part models, and are grouped into part catalogs. In plumbing drawings, catalog-based content includes plumbing equipment (called multi-view parts, MvParts, or parts) and plumbing fixtures. You specify systems (a type of style) for catalog-based content. A system stores properties that all building system objects assigned to the system can share. This gives a consistent look and feel to the systems in a drawing. See Working with Style-Based Content on page 85 and Working with Catalog-Based Content on page 79 for more information on content types. Creating Style-Based Content Style Manager lets you create style-based content on page 599 that defines plumbing lines, plumbing fittings, and schematic objects. You convert batches of existing objects to schematic symbol styles in the following ways: ■ Convert the schematic symbol styles provided with AutoCAD MEP to their individual components (the settings and the view blocks), customize the components, and then convert the components back to schematic symbol styles ■ Convert a batch of AutoCAD blocks in a custom block library to schematic symbol styles Creating Catalog-Based Content You can create 2 types of catalog parts, parametric and block-based, using Content Builder. Content Builder is a content creation tool that includes 3D modeling and 2D drawing features. For more information, see Building Parametric Fittings Using Content Builder on page 650 and Creating Block-Based Parts Using Content Builder on page 754. Configuring Plumbing System Definitions This section explains how to configure properties that control the appearance and behavior of objects in your plumbing system designs. Customizing Plumbing Content | 477