I have seen one off a 2" city line. Owner installed it to get insurance credit for hydrant within whatever distance to his 40' tall rack storage building. I went to look it over for retrofit of spkr, say 1986?
Imagine my surprise when I saw the 2" stubbed in for a spkr supply..... No, we didn't bother running a flow test on the hydrant to see if we could get enough water for what was a pod type of storage. glc -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - work Sent: Friday, April 27, 2007 7:59 AM To: [email protected] Subject: Re: historic building and shooting the messenger Since most hydrants (that I'm aware of) are 5" or 6" , I doubt is many would be connected to an1-1/2" line. At 02:05 PM 4/26/2007, you wrote: >Ed, > >In order to conduct a flow test on an 1-1/2" line wouldn't you just >have to find a way to provide an open orifice who's size and >coefficient of discharge, based on the configuration of the outlet, >were known? >I've spent a little time reading through NFPA-291 (studying for >certification exams). It would seem possible to rig up some kind of >outlet to be flowed, and a port for a 50 or 60 psi gage on the >opposite side of the outlet, which would eliminate the need for a pitot tube. >Information in 291 suggests a gage so configured will yield results >approximately the same as a pitot. > >I don't know, just thinking that one through. >PARSLEY CONSULTING >Ken Wagoner, SET >760.745.6181 voice >760.745.0537 fax >[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> e-mail >www.ParsleyConsulting.com <http://www.ParsleyConsulting.com> website > > > >Ed Kramer wrote: >>Scott - verify the size of main in the street. NFPA 13D doesn't require a >>traditional flow test (only a static pressure), but it's based on the >>assumption the public water main is 4" minimum. >> >>If the main is indeed less than 4", a traditional flow test is justified. >>Even at the low total flow of 2 residential sprinklers, the pressure drop >>(residual pressure) in the 1 1/2" main can be significant. Now how to >>conduct a flow test on a 1 1/2" line is a whole different can of worms. >> >>Ed Kramer >>Littleton, CO. >> >> >> >> >>>>Do you recommend flow tests for residential systems? >>>>I want one, but most people are telling me, the 1.5 inch pipe out in >>>>the street with 50 psig is enough. (1.5 inch?????) >>>> >>>>Does not seem like enough information to me. Don't have a level of >>>>comfort with it. Have 2 stories above grade and want to use extended >>>>coverage heads. >>>> >> >> >>_______________________________________________ >>Sprinklerforum mailing list >>[email protected] >>http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> >>To Unsubscribe, send an email to:[EMAIL PROTECTED] >>(Put the word unsubscribe in the subject field) >> >> >> >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > >To Unsubscribe, send an email to:[EMAIL PROTECTED] >(Put the word unsubscribe in the subject field) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut 860-535-2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
