Pressure, Residual 2 : The pressure that exists in the distribution system, measured at the residual hydrant at the time the flow readings are taken at the flow hydrants
NFPA 24 Standard for the Installation of Private Fire Service Mains and Their Appurtenances, 2007 ed. http://pleasantprairieonline.com/services/fireandr escue/documents/24-13A-PDF.pdf, (Std: Instll of Prvt Fr Srvc Mains and Their Appurtenances - Amer) {190 NFC}