NFPA 13 final did more than simply say a means shall be provided.  The CMTC now 
says Indicate the means and state whether the when opened did it create the 
system flow demand.

I also submitted a PI allowing the main drain to be larger than 2 inches so it 
can provide the means on higher flow systems.  A literal interpretation of 13 
allows no ore than a 2 inch main drain.

Roland

Roland Huggins, PE - VP Engineering
American Fire Sprinkler Assn.       ---      Fire Sprinklers Saves Lives
Dallas, TX
http://www.firesprinkler.org





On Aug 1, 2013, at 1:20 AM, "Douglas Hicks" <[email protected]> wrote:

> 
> So after 15 years, there is still lots of confusion about the forward flow 
> and provision to do a forward flow test is still lacking in new systems.

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