PI4: Water pressure <60 PSI for fixtures

Purpose

Reduced water pressure saves water, conserves energy, and helps ensure proper operation of fixtures and appliances.

Criteria

Upon installation of the plumbing system, verify that the static service pressure is a maximum of 60 pounds per square inch (psi) (414 kilopascals [kPa]).

Clarifications

Units supplied by a municipal water supply must either use pressure regulating valve (PRV) upstream of all fixture connections or provide documentation from the public water supplier stating that water pressure will not exceed 60 psi.

Units supplied by groundwater wells must meet this requirement by installing a pressure tank.

Confirmation

The builder must present documentation demonstrating compliance of criteria to the EarthCraft Technical Advisor prior to submitting project for certification, or TA may verify water pressure during final inspection.