I might be a couple years out of date. I think the ones we saw were off domestic water, with a small backflow device. You can’t run a restaurant without water, so there is no concern about water system not being monitored.
Best. > On Aug 14, 2019, at 15:19, Travis Mack, SET, CFPS, CWBSP, RME-G via > Sprinklerforum <email@example.com> wrote: > > I’m sure some of you have dealt with these Captive Aire / Piranha systems. > Basically they are hood systems that connect to the sprinkler system. The > one I have a data sheet for has an operating pressure of 32-70 psi and flows > vary depending on # of nozzles. How do those of you dealing with these > handle them? The supplier will not do any calculations for the system. My > question is, do we treat these like a “rack” system and balance the hood > systems to the overhead? If I have a kitchen with 3 of these, do I figure 0, > 1, 2 or 3 flowing simultaneously with the overhead. As you can imagine, a > standard sprinkler in the kitchen is ±10 psi. Now, if we have to treat this > like a rack system and balance at the junction point, this 30 psi for the > Piranha system will significantly over-discharge the sprinklers leading to a > much larger kitchen demand. These often seem to be brought up toward the end > of the project leaving everyone scrambling. > > What has the collective group been doing with these things? > > <image002.jpg> > Travis Mack, CFPS, CWBSP, RME-G, SET > MFP Design, LLC > 3356 E Vallejo Ct > Gilbert, AZ 85298 > 480-505-9271 > fax: 866-430-6107 > tm...@mfpdesign.com > www.mfpdesign.com > > Send large files to us via: https://www.hightail.com/u/MFPDesign > LinkedIn: https://www.linkedin.com/in/travismack > > “The bitterness of poor quality remains long after the sweetness of low price > is forgotten.” > > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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