Taylor, thanks. Essentially the drawing is what I have been using. Junction of flowing and non-flowing water. The only difference is if there are significant elevation changes, I will use the dead end reading technique for a looped main, which allows me to easily include elevation. Todd Williams
Fire Protection Design/Consulting Stonington, CT 860-608-4559 > > On Apr 11, 2025 at 10:03 AM, <Taylor Schumacher > (mailto:[email protected])> wrote: > > > > > > Accounting for elevation is paramount and that will need to be adjusted for. > onX has the best elevations. > > > > > > > > Aside from that I’ll give the same answer that I got years back from Steve > which is, go look in a wonderful little book called “Sprinkler Hydraulics” by > Harold Waas, Jr. There’s a chapter titled "Relating Hydraulic Calculations to > the Water Supply” which answers this fully and describes the differences in > circulating mains and dead end mains. > > > > > > > > Since this book is from 1983, I’ll save you scouring eBay like I did in 2017, > I’ve attached the picture since it’s a Friday. > > > > > > > > Taylor Schumacher > > > > Security Fire Sprinkler > (https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fwww.j-berd.com%2f&c=E,1,Yt9BeQS9xZonekrTGThqLK6CF4-qzflGm2V_35QNvfjQSgRMIPicK_Rf6In-41AnwYXYPAiE8mq8AxRAtiQTesAbRcy4_xgqVoXU0XecK82xfme0oTg88aEvBD4q&typo=1) > > > > > 1 Industrial Blvd | Sauk Rapids, MN 56379 > > > > Office: 320.640.7050 | Cell: 605.212.2132 > > > > > > > > > From: cw bamford <[email protected]> > Sent: Friday, April 11, 2025 8:30 AM > To: Discussion list on issues relating to automatic fire sprinklers > <[email protected]> > Subject: [Sprinklerforum] Re: Effective point of a flow test. > > > > > > > > > > NFPA 291 from 2022 Fire Pump Handbook 4.4.6 I have used Google Earth Pro > It has Elevation (not perfect but close and you can get elevation > Change between hydrant(s)) Hose Monster has a Good 8 page PDF on Hydrant Flow > Testing Chuck Bamford On Fri, Apr 11, 2025 > > > > > > > > Warning: Unusual sender <[email protected] > (mailto:[email protected])> > You don't usually receive emails from this address. Make sure you trust this > sender before taking any actions. > > > > > > > > NFPA 291 > > > > > from 2022 Fire Pump Handbook > > > > > > 4.4.6 > > > > > > > > > > > > I have used Google Earth Pro > > > > > > It has Elevation (not perfect but close and you can get elevation > Change between hydrant(s)) > > > > > > > > > > > > Hose Monster has a Good 8 page PDF on > > > > > > Hydrant Flow Testing > > > > > > > > > > > > Chuck Bamford > > > > > > > > > > > > > > > > > > > > > > > > On Fri, Apr 11, 2025 at 5:29 AM Fpdcdesign <[email protected] > (mailto:[email protected])> wrote: > > > > > > > > > > > > > What is the effective point of a hydrant flow test? By that, I mean the > > point you should design from. I was told from the beginning that it is at > > the intersection of flowing and non-flowing water (i.e the connection > > between the point of the flowing main with the branch to the hydrant where > > the pressures are read.) Am I doing something wrong? > > > > > > > > > > > > > > > > > > > > > > > > This comes from a test that a regional water company did and they will only > > tell me what hydrant was flowed. It could make a difference because of > > elevation. > > > > > > > > > > > > > > > > > > > > > > Todd G Williams, PE > > > > > > > > > > Fire Protection Design/Consulting > > > > > > > > > > > > Stonington, CT > > > > > > > > > > > > 860-535-2080 (tel:860-535-2080) (ofc) > > > > > > > > > > > > 860-554-7054 (tel:860-554-7054) (fax) > > > > > > > > > > > > 860-608-4559 (tel:860-608-4559) (cell) > > > > > > > > > > > > > > > > > > _________________________________________________________ > > SprinklerForum mailing list: > > > > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > > (https://linkprotect.cudasvc.com/url?a=https%3a%2f%2flists.firesprinkler.org%2flist%2fsprinklerforum.lists.firesprinkler.org&c=E,1,gpUuAA9RtQ3W-mHPHvoJCpqhXTqBZksIXiaan-wJfkfPMZHuwowiCeRhI2cV9RTP3rcDE9axUfZ327NUIx3FfnqFpkjN1Lhk4PQQ_TmP5ni8A8JNHPCeLQ,,&typo=1) > > To unsubscribe send an email to > > [email protected] > > (mailto:[email protected]) > > > > > > > _________________________________________________________ SprinklerForum > mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to [email protected] >
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