Quite possible. If that sprinkler was driving everything else then it could happen.
It’s likely your total demand dropped significantly. See where your most demanding sprinkler is with that piece as 1”. Also look at what each sprinkler is actually flowing. Now change it to 1.25” and see the difference in those items. This is hydraulic calcs for sprinklers 101. Travis Mack, SET MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone > On Jan 30, 2018, at 6:32 AM, Vince Sabolik <[email protected]> wrote: > > Basic hydraulics - not strange at all. The calc balanced to the change. > > > >> On 1/30/2018 8:25 AM, Brian Harris wrote: >> I have a calculation for a dry system that is currently -2.945 psi (-19.8%) >> over the curve. My most demanding head is one of (2) heads on a 1” arm-over, >> if I change the section of pipe (7’-6” long) that feeds this head to 1-1/4” >> my calc changes to +24.168 psi (136.8%) under the curve. Seems >> fishy to me, thoughts? >> >> Brian Harris, CET >> BVS Systems Inc. >> Design Manager >> bvssystemsinc.com >> Phone: 704.896.9989 >> Fax: 704.896.1935 >> >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > -- > <20914 x WTFP Logo NEW1.jpg> > 11351 Pearl Road / Suite 101 > Strongsville, Ohio 44136 > Phone 440 238-4800 Fax 440 238-4876 Cell 440 724-7601 > > Vince Sabolik > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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