My understanding is pipe must still be pitched and return bends required. 

Travis Mack, SET
MFP Design, LLC
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Sent from my iPhone

> On Mar 16, 2015, at 8:03 PM, Sean Lockyer <[email protected]> wrote:
> 
> Even though (non-dry) pendent sprinklers must be installed on return bends on 
> dry systems what about pendent sprinklers in a heated/conditioned space that 
> is protected by a double-interlock, pre-action system (such as a video 
> production room, etc.) ?
> 
> Does the fact that it is above a conditioned ceiling space matter ? To my 
> knowledge there is nothing in NFPA codes or the manufacturers listing that 
> give you an allowance for special situations like this but I was wondering if 
> anyone else has any experience with this sort of issue ?
> 
> I would like to hear everybody's thoughts..
> 
> 
>               Sean Lockyer
>               Project Designer                               4617 Parkbreeze 
> Court
>               Cell    386-279-1197                              Orlando, 
> Florida 32808
>               [email protected]              Phone:      407-816-9101
>               www.AITLifeSafety.com                       Fax:         
> 407-816-9104
> 
> 
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