As a 50+ year firefighter/fire engineer, the number that I would expect to see on the standpipe signage if it is anything other than 150 psi, is the pressure required at the FDC; in this case 178 psi. Both the pressure available from the city and the pressure available from the engine's fire pump are variable, so the fire engineer/pump operator sets the pressure based on the conditions present at the time the FDC is being pumped, then varies it depending on the information coming from the firefighters on the hose lines connected to the standpipe. If the FDC only serves sprinkler systems, then the fire engineer/pump operator will adjust the pressure to maintain the pressure indicated on the FDC sign. Regards, Dwight HavensFire Protection Engineer & Retired Fire Code Official, but still a volunteer Firefighter/Fire Engineer
On Friday, February 9, 2024 at 12:16:06 PM EST, Kevin Hall <kh...@firesprinkler.org> wrote: 178 | | | Kevin Hall, M.Eng., P.E., ET, CWBSP, PMSFPE | | Sr. Manager, Engineering and Technical Services | | American Fire Sprinkler Association | | p: | 214-349-5971 | | w: | firesprinkler.org | | | | Treat Your Apprentices Like VIPs! AFSA’s Virtual Instruction Program (VIP) for Apprentices is training that comes straight from our expert instructors. They lead the way to ensure your men and women are trained, letting you focus on OJT. Click here to learn more and enroll. On Fri, Feb 9, 2024 at 12:14 PM George Medina Jr. <los_amigos_b...@yahoo.com> wrote: If the required pressure at the FDC is 178 psi and the City pressure is 84 psi, do I subtract the 84 psi from the 178? or do I just put the 178 psi on sign? George Medina Jr. Sr. Fire Sprinkler DesignerSINGLETON FIRE PROTECTION INC. _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to sprinklerforum-le...@lists.firesprinkler.org _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to sprinklerforum-le...@lists.firesprinkler.org
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