What is the maximum water service pressure where the building distribution system begins?

The maximum water service pressure where the building distribution system begins is commonly set at a threshold to ensure the efficiency and safety of plumbing systems within a building. 80 psi is typically recognized as the upper limit for residential buildings because pressures exceeding this level can cause undue stress on plumbing fixtures and connections, potentially leading to leaks, burst pipes, and other failures.

Establishing a maximum pressure helps maintain the integrity of the plumbing system and ensures the comfort of occupants by avoiding excessively high pressures that can create noise or make it difficult to control the flow of water. Utilities often regulate service pressures to remain within this range, aligning with best practices and safety standards in plumbing design. This makes 80 psi not just a guideline, but an essential benchmark for safe and reliable building water distribution.