I looking at a similar issue right now that deals with the size of a pressurized (not cheep) tank designed / to old low flow heads. Modifications to the system. . . Now I can't get 10 min duration with the same tank.
Sent from my iPhone On Jan 9, 2013, at 4:21 PM, "Sean Lockyer" <[email protected]> wrote: > > > From: Sean Lockyer > Sent: Wednesday, January 09, 2013 5:11 PM > To: '[email protected]' > Subject: RE: Pre-.05 density heads: What heads can be used as a replacement ? > > > > The sprinklers in question are the old Central, Low Flow, Optima Pendents > which are 3.0 K-factor and are installed in a standard 3-story apartment > building (13R, 1997/1999 Edition). If the spacing was limited to 12' x 12' or > even 14' x 14' then I think a standard 4.9 at those same spacing requirements > will suffice but I have never seen a residential system installed in an > apartment installed with sprinklers spaced at less than 16' x 16'. Keep in > mind, this is from the late 90's and is located in the Central Florida area. > During those days most sprinkler companies used those 3.0K low flow heads and > had ¾" lines, 1" mains, and 1-1/4" risers while spacing those babies out at > least 16' x 16' and at 20' x 20' at least half the time. (Trust me, I know-I > was one of them, lol!) > > > > For the single head, single room areas I am not worried but in the multi-head > compartments I am worried as all get out. I know that Tyco issued a > "compatibility chart" that listed the current LFII as a "principal > replacement" for the old Optima series but that is a bit of a vague stretch > to assume that settles things.... > > > > NFPA really needs to address this-either in a future standard of 13R or at > least a white paper or a formal interpretation.... > > > > Sean Lockyer > > Project Designer 4617 Parkbreeze > Court > > Cell 386-279-1197 Orlando, > Florida 32808 > > [email protected] <mailto:[email protected]> > Phone: 407-816-9101 > > www.AITLifeSafety.com <http://www.aitlifesafety.com/> > Fax: 407-816-9104 > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130109/c96d3b02/attachment.html> > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: image001.jpg > Type: image/jpeg > Size: 8903 bytes > Desc: image001.jpg > URL: > <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130109/c96d3b02/attachment.jpg> > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
