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 > (mailto:[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] > (mailto:[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 > > (https://www.firesprinkler.org/technicalreview) to submit a question > > today! (Member login required.) > > > > > > > > > > > > On Oct 29, 2025, at 12:59, Taylor Schumacher <[email protected] > > (mailto:[email protected])> wrote: > > > > > > > > > > > > > > > > > > > > _________________________________________________________ > > SprinklerForum mailing list: > > > > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > > To unsubscribe send an email to > > [email protected] > > (mailto:[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] > > (mailto:[email protected]) > > _________________________________________________________ SprinklerForum > > mailing list: > > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > > To unsubscribe send an email to > > [email protected]
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