For once we have s post where a double interlock pre action is actually the
proper system and our fellow forumite wants to use a single interlock. If
you use a SIPA you'll have ice in your pipes before a head fuses. A DIPA
WONT FLIW Wter into the piping until sprinklers are fused.

On Sunday, September 18, 2016, 321 <> wrote:e

> I have a very large Freezer/Cooler project that I am managing. My initial
> idea on this job has been to use a Wet Pipe System above the Freezer with
> ESFR Dry Pendents (Class IV in rack to 20'). Due to the exorbitant cost of
> the ESFR Dry Pendents I'm letting my thinking expand to possibly running
> Single Interlock Pre Action inside the Freezer ...since the Freezers are
> already up (yeah...I know !!).
> The ceiling panels are 6" thick and I was wondering if any of you guys in
> your history have ever hung Fire Sprinkler Pipe inside a Freezer attaching
> to/thru the panels and how?
> Thanks in advance
> Atlantic Realty and Building, LLC
> Palm Beach Gardens, Fl
> 561-707-5150
> John W. Farabee
> V.P. Fire Sprinkler Division

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