Fire Protection Systems

Testing requirements regarding valves used in water based fire protection systems is found on chapter 13 of NFPA 25.

Either fabricate a seismic separation assembly using flexible couplings and grooved elbows (as shown in NFPA 13 figure A.9.3.3(a)) or install a listed seismic expansion joint (such as Metraflex FireLoop seismic expansion joint for fire sprinkler systems or TriFlexLoop | Anvil International).

I think the technical committee instead of using these words " Conspicuously marked and easily accessible emergency shutoff switches shall be provided at each facility"  desired a prescriptive language which may not have been evidence based. I suppose we all can extrapolate what 20 ft or 100 ft means. It must have worked over the years to an…

It would seem that a check valve or back flow preventer is non existent or not functional. And mixed foam is leaking back into water supply.

In the past, I have had the clerk of the works for the project sign as the owners representative. If there is not one for your project, a project manager for the construction manager or even the job superintendent for the general contractor could serve as the owners representative. I've never run into any type of certification for the owners…

Are you referring to a surge type pressure vessel? Contractors max out the pressure ratings when they choose a fire pump, normally to the point at which the jockey pump stops at 165 psi and starts at 155 psi. So in a fire pump room that has no air conditioning what happens when the temperature rises and falls 50 degrees in one day? The system…

You better hire a fire protection engineer or a fire protection specialist for a proper design using master streams.The design basis will depend on the hazard being protected (for example, API 2510/2510A for protecting LPG tanks or NFPA 11 for tanks storing combustible liquids).   Monitors are usually connected almost directly to the underground…

Hi Bernard:   I would think section 23.4.4.7.2 would apply to the small compartments in the design area. Otherwise, the sprinklers in the dormers would be included in the calculations.   Excerpt from 2016 NFPA 13   My best. Milt Werner

There is no requirement in NFPA 20 of operating or testing diesel engines before the acceptance test. Unless required by the engine manufacturer, it will be a decision by the AHJ.