Brian,
That happens quite often, I learned hand calcs from the Great Dell Milam back in 1974. Take a look at your results and you should see the flow and pressure are both lower. Mike ________________________________ From: Sprinklerforum <[email protected]> on behalf of Brian Harris <[email protected]> Sent: Tuesday, January 30, 2018 8:25 AM To: [email protected] Subject: Is this remotely possible ?? 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<http://bvssystemsinc.com/> Fire and Life Safety Contractors - BVS Systems<http://bvssystemsinc.com/> bvssystemsinc.com BVS Systems Inc. is the leader in fire protection system installations and inspections in the southeast. We are licensed, bonded and insured and perform work in NC ... Phone: 704.896.9989 Fax: 704.896.1935
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