What is the maximum allowable static water pressure at the building entrance?

The maximum allowable static water pressure at the building entrance, as detailed in the International Residential Code (IRC), is set at 80 psi. This standard is important for ensuring that plumbing fixtures and systems can function properly without causing undue stress or damage.

Water pressure that exceeds this limit can lead to various issues, including leaks, excessive wear and tear on pipes and fixtures, and even potential structural damage over time. Maintaining the static water pressure at or below this threshold helps in safeguarding the integrity of the plumbing system and the overall safety of the building occupants.

The IRC provides guidelines to help builders and contractors ensure that water pressure remains within safe parameters during installation and after the system is put into service. It's common practice for municipalities and utility companies to regulate pressure levels at the point of entry to assist in these efforts.