| The language in NFPA 13 is clear from my perspective. One air release per wet sprinkler system.
For example - A 50 story building with one wet sprinkler zone control assembly per floor would require 50 air release valves.
John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 Ken, I think you would have to with the check valve. I would push back a little in that by adding a normally open valve and a flow switch or manifold would not change the physics of the system enough to warrant the additional vents. If you had a 2 story building without zone valves, you would only need one vent. However, if you add normally open valves and flow switches, you would now need 2 (or 3?). From the standpoint of physics, why?
Yes, Todd, on each floor,
as they're using a Victaulic UMC manifold which includes a check
valve.
thanks for the information,
Ken Wagoner, SET
Parsley Consulting
500 West Mechanic Street
Harrisonville, Missouri 64701-2235
Phone: (760) 745-6181
Visit
the website
On 10/9/2023 10:49 AM, Fpdcdesign
wrote:
Is there a check valve on
the floor control assembly?
Forumites,
I'm working on a multi-story building protected per NFPA
13. As each floor has a separate control valve, is a
means to vent trapped air required on each floor? Or is
it only required at the highest level of the building?
My thinking is that each floor has a separate fire
sprinklers system.
Any thoughts?
Ken Wagoner, SET
Parsley Consulting
500 West Mechanic Street
Harrisonville, Missouri 64701-2235
Phone: (760) 745-6181
Visit the website
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