What is the fixture GPM rating at 80 PSI?

The fixture GPM (gallons per minute) rating at 80 PSI is determined by the flow rate specifications set forth for various plumbing fixtures. Plumbing codes and standards typically provide maximum flow rates based on pressure conditions, ensuring that fixtures operate efficiently without excessive water use.

In this case, a rating of 2.5 GPM is commonly assigned to many residential plumbing fixtures, such as faucets and showerheads, when tested at an inlet pressure of 80 PSI. This flow rate balances the requirements for adequate water delivery while also promoting water conservation practices.

Fixtures designed to meet modern efficiency standards often aim for this flow rate to ensure performance without excessive consumption, adhering to both environmental guidelines and user comfort. Thus, the rating of 2.5 GPM represents a widely accepted benchmark, making it the correct choice in the context of this question regarding fixture performance at 80 PSI.