Specifications for installations inside buildings conveying water for human consumption - Part 3: Pipe sizing - Simplified method

This technical specification outlines a streamlined approach for calculating pipe diameters within plumbing systems designed to convey potable water for human consumption inside buildings. The document establishes simplified calculation methodologies intended to facilitate the design process for engineers and installers while ensuring the system meets essential performance criteria. It focuses specifically on the third section of a broader series concerning water supply systems, providing clear guidance on sizing pipes based on flow rates, pressure requirements, and network layouts. The content addresses the fundamental principles needed to determine appropriate conduit dimensions to maintain adequate water pressure and minimize friction losses throughout the distribution network. By adopting these simplified methods, practitioners can efficiently plan installations that comply with the underlying technical requirements for safe and reliable drinking water delivery. The standard serves as a practical reference for designing internal plumbing infrastructure without requiring complex hydraulic modeling for every scenario, thereby supporting consistent implementation of water supply standards across residential, commercial, and public building projects.