This may have been discussed previously, I don't recall. Assume an underground fire service enters a building, multiple system risers are located in an interior mechanical room approx 50' from the stub-in location. In the mechanical room there is a backflow prevention device and multiple system risers. Where is the "base of riser" - you know, the "base of riser" that listed on the hydraulic design placard?
a) At the bottom of each individual system riser - a slightly different physical location for each system? b) At the discharge side of the backflow prevention device? c) At the inlet side of the backflow prevention device? d) At the underground flange? I'm curious how others see this. Ed Kramer Lawrence, KS _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
