[Sprinklerforum] Re: Flexible assembly on pump discharge in seismic cat D area

[Parsley Consulting]

Craig, If you're looking to provide that much flexibility, my thought is that the solution Mike provided would certainly suffice. I admit to never having run across this requirement before, however the question popped into my head - wouldn't the same requirement apply to the suction side of the pump as well?  It would seem applicable that the same motion would need to be accounted for on the suction side of the pump as well as the discharge side. my thoughts only, Ken Wagoner, SET Parsley Consulting 3002 Younger Drive Harrisonville, Missouri 64701-3909 Phone: (760) 745-6181 Visit the website On 2/10/2026 9:28 AM, Prahl, Craig wrote: I have a packaged fire pumphouse, discharge exists horizontally through the wall and then turns down to connect to the underground outside of the bldg.   The seismic design category SDC) is “D”.    I am being told by the project ME that we should have a flexible connection on the discharge side outside the bldg. to accommodate the potential of 8-inches of movement between the pumphouse and underground piping system.   I’ve looked around to try and find such an assembly for 8” pipe suitable for an outdoor installation and so far haven’t found such a device.   So, my question for those out there in seismically active areas, is this standard practice and who makes such an assembly?    Craig Prahl | Jacobs | Fire Protection SME – EV, AM, DC, Special Hazards craig.pr...@jacobs.com | www.jacobs.com 1041 East Butler Road   Greenville, South Carolina  29606 CONTACT BY: Phone 1-864-676-5252, Email or MS TEAMS   NOTICE - This communication may contain confidential and privileged information that is for the sole use of the intended recipient. Any viewing, copying or distribution of, or reliance on this message by unintended recipients is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message and deleting it from your computer. _________________________________________________________ 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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