you can't have the heads on pendant drops without a return bend.
Craig D. Hanson, CFPS Fire Division Manager West Coast Code Consultants, Inc. (WC³) Meridian Satellite Office *C:* 253.225.9977 | *E:* [email protected] | www.WC-3.com <https://www.wc-3.com/> *Teaming With Your Community to Make a Difference* On Thu, Apr 3, 2025 at 7:28 AM JD Gamble <[email protected]> wrote: > I’m with Ben, the delivery time is what’s going to slam the door closed on > going Dry without some deep thought. > > Get Outlook for iOS <https://aka.ms/o0ukef> > ------------------------------ > *From:* Jay Google <[email protected]> > *Sent:* Thursday, April 3, 2025 6:59:58 AM > *To:* Discussion list on issues relating to automatic fire sprinklers < > [email protected]> > *Subject:* [Sprinklerforum] Changing Antifreeze to Dry System > > Thanks for the responses. This group always helps with things you know, > but haven't done for a while and refreshes our memories, especially old > ones! > > *Jay Stough* > *Tustin Fire Solutions* > > > On Thursday, April 3, 2025 at 08:37:35 AM EDT, Ed Kramer < > [email protected]> wrote: > > > Jay, check out section 27.2.4.7.2 in NFPA 13 (2019). It might allow you > to omit several sprinks in those small closets from the calc. > > > > Ed K > > Bamford Fire > > > > > > *From:* Jay Google <[email protected]> > *Sent:* Thursday, April 3, 2025 6:26 AM > *To:* Sprinkler Forum <[email protected]> > *Subject:* [Sprinklerforum] Changing Antifreeze to Dry System > > > > We have a customer that wants to change the existing antifreeze to a dry > system. All the sprinklers on the system are pendents on drops. It is a > pipe schedule system. I think the best way to do this is keep the existing > piping, change the sprinklers and verify the pipe is pitched correctly to > drain as required or add low point drains if needed. This way the > sprinklers line up with existing holes from the attic. The building is an > independent living building (light hazard/residential). My questions are > 1) does the system need to be calculated since it's a pipe schedule and 2) > If so, can we use the room design method on a dry system? We are on the > 2019 edition of NFPA 13. I did not see anything in chapter 19 on using > room design for dry systems and don't recall ever seeing that. With that > in mind, if we calculate the 1950 sq. ft., there are a lot of closets > included in that that kill the calculations. > > The building was built in 1999, of course no drawings and the pipe looks > as good as new inside and out. > > > > *Jay Stough* > > *Tustin Fire Solutions * > > _________________________________________________________ > 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]
