why not calc it.  It’s not like it needs to be accurate to the second decimal 
place so being a little conservative on your assigned variable is tolerable.  I 
did an article on this ion Sprinkler Age last year.

Roland

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





On Feb 21, 2014, at 6:31 AM, Fire Protection Services <[email protected]> 
wrote:

> Forum,
> 
> Has anyone performed the forward flow test through the main drain?
> I have a light hazard occupancy with 230 gpm system demand. I'm pretty sure
> I can achieve that with the 2" drain. My question is, do you add a playpipe
> or any fittings to the 45 on the drain or can you pitot the drain flow as
> is? What coefficient would you use if not adding a playpipe?
> 
> 
> 
> Thanks!
> 
> Chris Payne
> NICET Level 3
> Fire Protection Services
> Owensboro, KY
> <[email protected]>
> _______________________________________________
> Sprinklerforum mailing list
> [email protected]
> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org

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