What dictates the minimum and maximum pressure requirements for plumbing fixtures in a building?

The minimum and maximum pressure requirements for plumbing fixtures in a building are dictated by the building code. Building codes are established by local, state, or national authorities to ensure safety, health, and welfare standards for construction, including plumbing systems. These codes specify the acceptable pressure ranges necessary for the proper functionality of plumbing fixtures, helping to prevent issues such as water wastage, leaks, or inadequate water flow. Compliance with building codes is mandatory, and they are regularly updated based on advancements in plumbing technology and best practices. This ensures that all plumbing installations meet a consistent standard for quality and safety, regardless of who undertakes the work, be it the owner, architect, or contractor.