Having the inspectors test at the riser does not provide a valid test of the alarm attachments. When the orifice is the same size as the smallest sprinkler orifice in the system, the flow at the riser can be considerably more than the flow from the highest and most hydraulically remote sprinkler. It does not represent the minimum flow from that highest and remote sprinkler.
A more valid (but not always valid) test would be to require that the IT orifice at the riser, to be a size smaller than the orifice in the smallest sprinkler. BTW I like it at the riser for the reasons Steve mentioned, and that it reduces the exchange of water in the system. Ed Vining 4819 John Muir Rd Martinez CA 94553 925-228-8792 Cell 787-0465 On Fri, Jan 14, 2011 at 12:40 PM, Steve Leyton <[email protected]>wrote: > True, but the latest editions are very clear that it is not required nor > even recommended to locate the ITV at the most remote portion of the system: > > NFPA 13, 2010 > 8.17.4.4 The alarm test connection shall be permitted to be > installed in any location on the fire sprinkler system downstream of the > waterflow alarm. > A.8.17.4.2 (Partial second paragraph) "... Putting the test connection > at the most remote portion of the system causes the introduction of fresh > oxygen into a large part of the system each time the alarm is tested and > increases the corrosion that will occur in the piping." > > The prevailing attitude has changed significantly since the 2002 edition. > On top of that, here in Southern California (as in other areas of this > state, and some areas in other states) we have to contend with stormwater > pollution prevention regulations that now strictly preclude and prohibit > sprinkler discharge onto hard surfaces that will run toward, or directly > into storm drain systems. It is much easier to coordinate a floor sink or > hub drain at the base of the riser, into which we can dump both alarm test > and main drain discharges, than to deal with the routing and accessory > sanitary sewer connections that come with remote test locations. > > Steve > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Tony Liddic > Sent: Friday, January 14, 2011 11:16 AM > To: [email protected] > Subject: RE: Code reference for replacing remote end inspectors test with > alisted Test N' Drain Valve.... > > Sean, > > The 2002 Handbook says the following after 8.16.4.2.3: > > "Ideally the inspector's test connection is located at the end of the most > remote branch line in the upper story. Such a location is not, however, > required. For a wet pipe system, the exclusive purpose of the inspector's > test is to verify operation of the alarm attachment, which is the reason > that the test connection is not mandated at the remote portion of the > system. The test connection is only required to be located downstream of > the alarm device." > > > Tony Liddic, CET > MRH Sprinkler Design LLC > 356 Laurel Glen Dr. > Springboro, OH 45066 > 937-369-7926 > http://www.mrhsprinklerdesign.com > [email protected] > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Sean > Lockyer > Sent: Friday, January 14, 2011 1:44 PM > To: [email protected] > Subject: Code reference for replacing remote end inspectors test with a > listed Test N' Drain Valve.... > > Does anyone know the specific code reference from NFPA 13, 2002 Edition, > that allows for the deletion of the remote end inspectors test when you use > a test and drain valve on the riser (Such as an AGF). > > I found it once but I'm having a heck of a time finding it again... > > Any help would be great appreciated as I would be in your debt... > > -- > Sean Lockyer > Project Designer > Delta Fire Sprinklers > (407) 328-3000, ext 139 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email > to:[email protected]<to%[email protected]> > (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email > to:[email protected]<to%[email protected]> > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email > to:[email protected]<to%[email protected]> > (Put the word unsubscribe in the subject field) > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
