Please, please help me here…I have a combined sprinkler/standpipe system with a 6” looped main located in the first floor and risers located in the staircases. The standpipe is a Class III system ,the first floor has exposed ceiling and it is a 4 storeys building. NFPA 14 Article 6.1.2.2...
Hi everyone,
I have to do a schematic design for a helipad foam-water system with oscillating monitors. The helipad is located on the roof of a 6 story building. The building has a combined sprinkler/standpipe system. The question is: can I connect the helipad deluge system to the combined...
With the alarm check valve in the system riser, the sprinkler side of the system is pressurized above peak incoming pressure to prevent false alarms. With the DCVA how do we do it? A time delay in the flow switch would be an acceptable solution? Is the time delay permitted by NFPA?
Help me here….I designed a wet sprinkler system having an alarm check valve in the system riser with multiple sprinkler zones on each floor. Each sprinkler zone is provided with supervised shut-off valve and flow switch. Our Building Code requires now a double check valve assembly on all...
I tried hard few years back to find a "listed" normally closed butterfly valve. Some tests were done on Nibco valves just to wire it the other way. They were not successful. I end up by choosing a Potter supervisory switch (http://www.pottersignal.com/Sprinkler/pdf/8820001-U_PCVS.pdf) installed...
