In some cases there is nothing you can do to get an accurate idea of the water supply.
In cities with decrepit infrastructures like Detroit, you can take proper flow tests on either end of an underground main, but it's virtually solid where you made the tie-in between these points, and don't know it until you flush the lead-in. This can be hard to explain to the owner. - Jeff Garrison -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Scott A Futrell Sent: Thursday, June 19, 2014 10:21 AM To: [email protected] Subject: RE: Location of Flow Test in Calc's Totally agree, however if the concept isn't understood it morphs to the email that started this thread. 400 gpm through old 4" or 6" is a bigger problem. The right way is to calculate to the flow, get the information to do it right. If it is a single-feed loop and you are on the remote end of that loop from the supply and the test, you need to account for the loss. Scott (763) 425-1001x12 Office (612) 759-5556 Cell -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of IPA Sent: Thursday, June 19, 2014 9:08 AM To: [email protected] Subject: Re: Location of Flow Test in Calc's In light & ordinary hazards it's usually not a big deal as long as you've accounted for elevation differences. 400 gpm flowing through a thousand feet of 8" DIP equates to a little over 1 psi friction loss. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
