Fire Department Connections on systems with zones at both riser and standpipe 1

[Shredocaster]

What is your take on this installation example. No shut-offs on the FDC line, on the water supply side of the check valve, not within a specific zone... or does that base standpipe riser shut-off become a problem?

 

[TravisMack]

The FDC is put on a riser header all the time. We have many where there is a site FDC that pumps up the underground and goes to various zones or buildings? NFPA 13 states that there are to be no shut off valves in the FDC piping. Yet, there is an exception for FDC attached to underground and FDC attached to a header. 8.17.2.4.3 is the section that describes exactly as your sketch shows.

What is the difference is the header is placed horizontally and has control valve assemblies ±2' apart, or the header is placed vertically and has control valve assemblies placed ±12' apart. Isn't that example, just a "vertical header" with the assemblies ±12' apart?

Travis Mack
MFP Design, LLC

http://www.mfpdesign.com

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[cdafd]

Looks good to me

What part are you calling the standpipe ??

 

[Shredocaster]

I tried to repost/correct the original diagram but it would not let me... here is a more complete sketch


Thanks!

 

[TravisMack]

What seems to be the issue / concern? It seems adequate to me. Where are you seeing the potential issue?

Travis Mack
MFP Design, LLC

http://www.mfpdesign.com

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[Shredocaster]

I don't. Someone else does. Always best to get input and perhaps be humbled by something you missed versus attacking "guns a blazing".

 

[cdafd]

Will have to look at 13 or 14, may have a similar riser diagram, to help support your design.

https://www.crokerfiredrill.com/wp-...iagram-Cropped-for-Website-e1439390795646.jpg

 

[TravisMack]

I think 8.17.2.4.3 of the 2016 edition of NFPA 13 will be your answer. It is permitted. I often see people that will have a problem with something because it goes across multiple floors, but won't have a problem if it were multiple risers in a warehouse. That is why I asked above, what is the difference of a horizontal "header" with risers 12" apart and the FDC on the horizontal header vs. a vertical header with "risers" 12' apart and the FDC attached to the "vertical header"?

Travis Mack
MFP Design, LLC

http://www.mfpdesign.com

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