What is the maximum allowable water pressure within a building?

The maximum allowable water pressure within a building is commonly set at 80 psi. This standard is implemented to prevent potential damage to plumbing fixtures and systems due to excessive pressure, which can lead to leaks, bursts, and other failures. Maintaining water pressure at or below this level ensures that plumbing fixtures operate efficiently and helps avoid wear and tear on pipes and fittings.

The establishment of 80 psi as the maximum limit is based on considerations of safety and utility. Beyond this threshold, the risk of damage increases significantly, both to the plumbing infrastructure and potentially to appliances that rely on water supply. Thus, the regulation stands as a protective measure for both the building's plumbing system and the overall safety of its inhabitants.