This book is the first of two self-supporting volumes that make up the 8th edition of Tables for the Hydraulic Design of Pipes, Sewers and Channels. It presents Tables A to provide a comprehensive range of solutions of the Colebrook-White equation, covering standard diameters from 20 mm to 4000 mm plus 4500 mm. These tables are in the format established in previous editions, with sequences of tables for incrementally varying roughness sizes. A new setting adopts 50 gradient increments per order of magnitude change, upgrading from the 35 increment system of previous editions.