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Can you check if there is an anti-vortex plate in the tank discharge?

For hydraulic calculations, you want to use one of the six curves listed under "Total Head in PSI". Those six curves represent the pump performance of different impeller sizes that are available with this model. You should select the curve that, when added to the water supply curve, will cover...

Thank you all for your input. I have also found studies done on car stackers, including this one for BAFSA... http://www.bre.co.uk/page.jsp?id=2149 And some guidelines from others who have designed sprinklers in car stackers...

Has anyone designed a sprinkler system for a parking garage with high denisty vehicle storage, aka car stackers? My feeling is that unlike an Ordinary Hazard occupancy of a typical garage, car stackers would need to be protected in accordance to the Storage and Commodities chapters of NFPA 13...

I call it the fire service, as it is the pipe that enters the building. Everything directly after the fire service, but before the feed main - check valve (or backflow preventer, if you have one), shut off valve, alarm check, main drain, main waterflow switch, pressure gauges - I would call the...

Does anyone have an opinion on what Occupany Hazard a beauty salon would be? I would normally refer to the Annexes in NFPA 13, Chapter 5 for the closest match, but nothing seems similar (maybe mercantile?). My feeling is that the fire loading is very low, and it could be considered Light...

All, In NFPA 20, editions 2007 and after, the requirement for strainers on the suction of vertical inline pumps was deleted. Does anyone know the reason for the deletiion? Was it a pump performance issue? Or was it cost driven by owners/contractors? In other words, if I still call for a...

All, Is there somewhere in NPFA 13 that states that if incidental storage is limited to 8 feet in a Light Hazard Occupancy, the design criteria can remain for LH, and not have to meet the criteria for Miscellaneous Storage (up to 12 feet)? Our senior guy seems to think that it is somewhere in...

This is in a B occupancy. I am awaiting an answer on what is going to be stored in the cabinet.

Also look at FMDS 3-26 for design criteria vs. NPFA 13 for non-storage applications. Design area, K-factors etc. are typically higher than NFPA minimums. Remember to check that all the sprinkler components are FM Approved (e.g. there is no approved concealed type, quick response sprinkler).

Forum, What are requirements for having a sprinkler inside a gas storage cabinet, such as the type found in a laboratory? The room itself is fully sprinklered. I could not find anything specific in NFPA 45, 30 or 55 that requires a sprinkler. Thanks.

Thank you pipesandpumps and spkreng for your insight!!! As I am sure you know, when you do something long enough, you forget if it was code, rule of thumb, common practice, or because someone told you to do it. This is a case where the hospital does not want this zoning.

Forum, Is it a code requirement for sprinkler zones to match smoke zones in a hospital (NFPA 13, NFPA 101, AIA Guidelines, JCAHO, IFC?)? Or is it just common design practice?

Thanks, PEDARRIN2. Great points, all!

TravisMack, Thanks, deleting the installation, set up and long term maintenance for the PRV's will definitely be a cost savings. PEDARRIN2, I agree with and will be complying with all the references that you've cited from NFPA 14. There will be PRV's on the hose connections. However, my...

Forum, I am designing a combined sprinkler standpipe system with pressures in excess of 175 psi, but below 300 psi. As such, there will be pressure regulating valves on the hose connections to limit the static and residual pressures. I was planning on having PRV's on the sprinkler floor control...

I didn't think wax heads were appropriate for this use either. Also, wax is applied by the manufacture at the factory and is part of their listing, whereas the bag is not. My point was that although the reasoning and logic to using bags is sound, it is not supported by the applicable standard...

I use the Bosch DLR165 mainly for floor-to-ceiling, pipe-to-wall measurements, for space take-offs. Up to 165 ft and within 1/16 in. accuracy, according to the specs. About $100. Doesn't work too well outside in the daylight, but that's not a common use for me.

Okay, there is similar language in NFPA 13 as well, but I don't know if you can extend the reason to use bags in a spray paint booth, to this type of facility.

I would highly recommend NOT using a plastic or paper bag to cover up the sprinkler. I have never seen a sprinkler head purposely covered up, and this would surely be against the listing of the sprinkler. If a typical sprinkler is supposed to operate at 155 degrees F, the sprinkler will be...