you're welcome! please post the static, residual, and flow here from both tests-- it would be informative to see how they compare!!!
Brad -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Colin Carew (Cambridge) Sent: Thursday, May 07, 2015 9:19 AM To: [email protected] Subject: RE: Flow test - Playpipe w/ 1 1/4" Tips Its ordinary Group 2 , based on just that 300 for the system demand . I used the in-correct coefficient . thanks ! I am going to do another test , luckily in my bad luck this is close to my office . -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Brad Casterline Sent: May-07-15 10:14 AM To: [email protected] Subject: RE: Flow test - Playpipe w/ 1 1/4" Tips What is your estimated demand? Coefficient of Discharge for playpipes is .97--- h= 70/.433=161.66 ft v=(2gh)^.5=102.03 ft/sec ((1.25/24)^2)*pi= .008522 ft^2, * 102.03 ft/sec= .8695 ft^3/sec, *7.48*60= 390 GPM, * .97= 379 GPM. Brad -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Colin Carew (Cambridge) Sent: Thursday, May 07, 2015 9:03 AM To: [email protected] Subject: Flow test - Playpipe w/ 1 1/4" Tips Hey All , I just did a flow test last night . Instead of flowing just the 2½ butt and getting the pitot pressure like I have done for years , We used (1) Play pipe with 1 1/4" Tip . When I convert the pito of 70 to GPM with the 0.90 Coefficient to = 363.41 GPM . Should I have flowed both sides with two play pipes to determine a higher flow rate . I have an old flow test from Two years ago that has a flow rate of 1186 Gpm . I am going to do another test next week and just flow the 2½ butt with no playpipes . Colin _______________________________________________ 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 _______________________________________________ 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
