Static Pressure 10 : The pressure that exists at a given point under normal distribution system conditions measured at the residual hydrant with no hydrants flowing
NFPA 291 Recommended Practice for Fire Flow Testing and Marking of Hydrants, 2002 ed. http://hep.ucsb.edu/people/hnn/wcp/NFPA291.pdf, (Recmm Prac: Fr Flow Tst and Marking of Hyd - Amer) {290 NFC}