It would be a lot easier if we could get a required flow and pressure at the 
pump discharge flange. Then it could be directly compared to the results of a 
pump test. We can get it manually but most people don’t go that far.   
  
  
  
  
Todd Williams     

  
Fire Protection Design/Consulting
  
Stonington, CT
  
860-608-4559
  
  
  
  
  

  
  
>   
> On Nov 20, 2025 at 1:53 PM,  <Parsley Consulting (mailto:[email protected])> 
>  wrote:
>   
>   
>   Permit me to echo what Tom Wellen said.
>   
>  Some calc programs out there show the -XX number, and some designers include 
> that value on the data plate, without considering what that negative number 
> really meant.   
>   
>  More than once I've been tasked to do a revision of a sprinkler system to 
> upgrade from OH2 to an ESFR and the data on the design plate was very little 
> help at all.
>   
>  be aware!  
> Ken Wagoner, SET
>   Parsley Consulting
>  3002 Younger Drive
>  Harrisonville, Missouri 64701-3909
>   Phone: (760) 745-6181
>    Visit the website 
> (https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fwww.parsleyconsulting.com%2f&c=E,1,Y5zKJKPEh1mBEBqSR-VE9cUKl5y-eyP8BpvmE_5j9ZqW2eJbNphYzrCMBZ-2YuX6d-RRkHI4gQ1FV-cvOeCfRC58uZS9NiToZv2mx7909oCqLvCW_n5hDHeK&typo=1)
>   _________________________________________________________ SprinklerForum 
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