The following article was written based on research conducted by the authors in the summer of 2010. Our hope is to educate the fire service with real facts about nozzles. Feel free to add your questions, comments, and suggestions. Click any of the pictures to open the article.
Thank you to the Wildwood City NJ Fire Department, West Wildwood NJ Fire Department, and Avalon NJ Fire Department for the use of their apparatus, nozzles and flow meters.
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[...] like smooth bore nozzles. They are the simplest and NEARLY fireman proof. Check out our Nozzles: Truths From The Street article for my thoughts on smooth bore versus combination nozzles. There are some very nice [...]
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Very solid and fair information. However it remains incomplete. Seattle fire performed an in-depth nozzle evaluation over the course of 2 years. Many of the issues this article addresses were realized in the SFD study.
The nozzle system chosen eliminated the shortcomings of each nozzle deficiency. The system is comprised of a TFT shutoff ( VIT ) with 15/16 built in smoothbore. Then a 75psi low pressure TFT MIDMATIC tip.
If any one would like a copy or wants to discuss this system, contact Brian Mattson ffseattle@aol.com
Great article, nicely done numbers. I always say, we currently do firefighting 80% emotions, 20% data… this clearly swings that the other way..like it should be.
Would have liked to have seen the vindicator nozzle tossed in there… next time.
A MUST READ…
I am not by any means discrediting this test/study you guys did but I am curious as to how a flow of 235gpm was achieved out of a 15/16" tip on 1 3/4 line? I have seen many other studies/tests done and the flow achieved is always around 185gpm with the 15/16 which we all know is the classic calculated flow. I unfortunately have not had an opportunity to flow test the nozzles from my department and this is something I am working on, but I am still just curious as to why the numbers you got were much higher than what is normally seen in other studies??? I have read this several times and love the fact that you got such high flows with just the 15/16" tip because I am an advocate of low pressure high volume nozzles but I just cant wrap my head around it. Obviously a calculation is not necessarily going to be accurate with everything but its just like the NR of the 15/16 @ 50psi, should be 69 pounds per the calc(1.57 x d(squared) x np) but you guys got 40 pounds. It says you used a scale to measure the NR, what do you mean by scale? A true weight scale or more of like a force gauge? I am simply asking these questions in a chance to clarify some things and help me out when I do flow tests with the equipment in my department. Thanks.