There is a local AHJ that has recently started comparing the residual pressure when the Inspector's Test Valve is opened to the Residual Pressure Demand on the Calc Plate. If the pressure drops below system demand pressure, they will not sign off on the final occupancy.
The main problem stems from the fact that these jobs are 13R projects and the inspector's test is at the riser. They are not measuring the flow so there is no way to know exactly how much friction loss is occurring through the test connection. I would assume it is substantially higher than what would occur through the system as designed, but they insist it is the right way to verify the calcs were done properly. Has anyone come across this, or have any ideas how to explain to the building officials? Thanks, Tony Liddic, CET MRH Sprinkler Design LLC 356 Laurel Glen Dr. Springboro, OH 45066 937-369-7926 http://mrhsprinklerdesign.com [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
