Yes that would be a trapped area and prone to freezing. Longer dry pendants should be used that connect directly to the arm over, and the arm over should be pitched to drain back to the branchline.
On Thu, Oct 30, 2025 at 1:21 PM Zachary Siegrist <[email protected]> wrote: > Sorry I didn’t specify. The concern is that drop section from the > horizontal portion to the top of the dry sprinkler. Thanks for your > response. > > Zach > > On Thu, Oct 30, 2025 at 12:14 PM Fpdcdesign <[email protected]> wrote: > >> Does the dry pendent go to the top of the return bend (arm over)? If so, >> would assume gravity would drain the water out of the sprig and arm over. >> If there is drop piping that goes from the arm over to the top of the dry >> sprinkler, you have a problem. >> >> Todd Williams >> Fire Protection Design/Consulting >> Stonington, CT >> 860-608-4559 >> >> >> On Oct 30, 2025 at 11:55 AM, <Zachary Siegrist >> <[email protected]>> wrote: >> >> Related to this, I have a dry system I’m reviewing that features return >> beds feeding a dry pendant head. My argument is that the environment is >> not maintained at 40F or above as mentioned in the 2016 edition section >> 7.2.2. I see water filling the return bend during a three year full trip. >> His argument is that he is using a listed dry sprinkler. Who is right? >> >> Zach >> >> On Wed, Oct 29, 2025 at 1:13 PM John Denhardt < >> [email protected]> wrote: >> >>> While fully allowed, having piping containing water in a dry pipe system >>> most likely will lead to accelerated corrosion of the dry pipe piping >>> system. >>> >>> *Thanks,* >>> >>> *John* >>> >>> *John August Denhardt, P.E* >>> Vice President Engineering and Technical Services >>> American Fire Sprinkler Association >>> 301-343-1457 >>> >>> *Are you a member with a technical question? * >>> >>> Don't forget one of the most valuable resources that AFSA provides is >>> Technical Reviews by our Technical Services Department. It’s like having an >>> FPE on your staff. Visit www.firesprinkler.org/technicalreview to >>> submit a question today! (Member login required.) >>> >>> On Oct 29, 2025, at 12:59, Taylor Schumacher < >>> [email protected]> wrote: >>> >>> >>> >>> _________________________________________________________ >>> SprinklerForum mailing list: >>> >>> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >>> To unsubscribe send an email to >>> [email protected] >>> >>> I have a dry system that is feeding upright sprinklers on sprigs in a >>> *heated* light hazard space. The owner wants to add ACT. I’m wondering >>> if I can use flex drops into the ACT. Feels weird, but I cannot find any >>> reason why I shouldn’t. >>> >>> >>> >>> *Taylor Schumacher* >>> >>> >>> >>> _________________________________________________________ >>> SprinklerForum mailing list: >>> >>> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >>> To unsubscribe send an email to >>> [email protected] >> >> _________________________________________________________ SprinklerForum >> mailing list: >> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >> To unsubscribe send an email to >> [email protected] >> >> >> _________________________________________________________ >> SprinklerForum mailing list: >> >> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >> To unsubscribe send an email to >> [email protected] > > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > [email protected] -- Ryan Spain 1700 S. Raney Street Effingham, IL 62401 217-342-2242 Office [email protected]
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