A fire pump piping and instrumentation diagram, or P&ID, shows the piping and related components of a physical process flow within a fire pump system. Before you set out to create a similar-looking diagram, often there is more than one symbol available for a particular piece of equipment. Each symbol is accompanied by a unique reference, which will detail the equipment design at each location in a separate process datasheet. This details the specification which the equipment should conform to. As the fire pump PID diagram illustrates, standard symbols represent the components in these diagrams. It is important to note that these symbols are not to scale and dimensionally accurate.