In LEED v4.1 WE Prerequisite: Indoor Water Use Reduction requirement, it reads:

Projects located where standard supply pressure is different than the LEED baseline supply pressure may calculate the water consumption of flow fixtures and fittings at the local standard supply pressure; the supply pressure must be consistent in the baseline and proposed case.

How can we show proposed water flow rates in different supply pressure? Are there baseline water flow curves we can refer to?