Where does a plumber refer to for checking the practices required for installing and testing a plumbing system?

The correct choice for where a plumber should refer to for checking the practices required for installing and testing a plumbing system is specifications. Specifications provide detailed descriptions of the materials, workmanship, and installation methods that must be followed in construction projects. They outline the requirements and standards that must be adhered to, ensuring that the plumbing installation meets the necessary safety and quality criteria.

In practice, specifications complement other documents like blueprints, which provide a visual representation of the project but may not detail specific installation practices. While installation manuals offer guidance for specific products, they may not encompass all aspects of plumbing installation overall. Building codes establish minimum legal requirements for plumbing systems, but they do not typically include comprehensive instructions or practices for installation like specifications do. Thus, specifications serve as the key reference for plumbers to ensure compliance and proper installation.