Gallons per minute or liters per minute refers to the amount of water used by flow fixtures in LEED.
Flow fixtures are fixtures that deliver a constant stream of water, such as faucets, showerheads, or
hose bibs. The flow rate of these fixtures is measured in gallons per minute (gpm) or liters per
minute (L/min), which indicates how much water flows through them in a given time period. The
LEED Green Associate Candidate Handbook states that one of the strategies for achieving water
efficiency is to “use low-flow faucets and showerheads (maximum 2.5 gpm at 80 psi)” [1, p.
14]. Reference: LEED Green Associate Candidate Handbook, [Water Efficiency | U.S. Department of
Energy]
