As per NFPA 25 Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, in Chapter 8, the 220.127.116.11.2.1 it states that if readings are above 95% of rated pump pressure, ... I read NFPA 291 Section 4.9 about flow testing without a pitot gauge, but I do not understand where to get the variables. Can anyone help explain the process a little better to me? We have a Type 3 construction of a retrofit of 100 year old assembly building with concealed space below the 1st floor that meets all the requirements of 18.104.22.168. The AHJ has questioned us, What is (3) Tight Construc... Que bombas listadas hay???Fire Protection Systems As per NFPA 13-2019 chapter 22.214.171.124.4 for design densities between 0.2 to 0.34 gpm CMDA sprinklers with K-8.0 or greater can be used. However, in the market from my research, there are no listed CMDA spri... I'm designing a sprinkler system in a ceiling area. I've decided to place sprinklers under and above the ceiling since the ceiling itself is combustible and there are also all electrical and HVAC installations. Are th... Are there any occupancy restrictions where a double interlock preaction system may be used? For example, could an entire hospital (Institutional) provide sprinkler coverage with a preaction system? It appe... We have designed three dry systems for an nursing home in Tenn.. The building is divided into (3) riser systems. Each Riser covers Attic Area and Living Area in it section. Upon plan review, the S... Good Evening all, What is the difference between AWWA compliant ductile iron pipes and ISO/EN compliant ductile iron pipes? What may go wrong if I replaced them? Regards, I'm looking for some information regarding UL listings and air compressors for dry sprinkler systems. Is there a requirement for the air compressor to be UL listed for this use? I know the air maintenance devic... Has anyone been asked/required to provide a sprinkler system for a prefabricated mobile unit approximately 499 S/F. It would be classified in the Residential Group R-1 and the units will be used for transi... Hello all, I am looking for a clear method to complete battery calculation for a Fire Alarm System. As per NFPA 72 , "The secondary power supply shall have sufficient capacity to operate the system under qu... This is a homeowner question: My adult son wants to buy 50+ acres in Oregon forest land. He wants to live there. Can he hire an advisor (e.g., a certified fire mitigation specialist) to advise him before he buys a sit... My scenario is below: 50 story condo-all concrete and steel 2 fire pumps in parallel on ground level 2 stairwells-both have floor control assemblies, 1 stairwell is for redundancy with all the valves and such. the... We recently upgraded an elevator in our detention center. The elevator inspector has cited us for having the heat detectors too far away from the fire sprinklers in the shaft and the mechanical room. ... LPG Fire can be emulsified with water? how you can justify using a firewater system for LPG handling industries. What are the NFPA flushing rates for external (unburied or underground) pipes? I believe that they should be the same flushing flows proposed for underground pipes as contemplated in NFPA 24 Than you,#Flushin... In hydraulic calculations (using software) we normally find the fire pump pressure requirement using farthest sprinkler as the reference point and than add hose stream allowance as per hazard requirement. I need some ... In a C1D1 environment do you have to tape threads? Or no? A company I called, Appleton, said no. They said to use Kwiko A or Chico A, sealing compound, but the threads can still cause a leak right? In a project detection system is installed along with sprinkler system. So at that can is zone control is mandatory? Can anyone suggest as per codes? Advance thanks.