Tough to tell without the plan but I have seen major pick-ups with minor 
changes
  
  
  
 Todd G Williams, PE  
Fire Protection Design/Consulting
  
Stonington, CT
  
860-535-2080 (ofc)
  
860-553-3553 (fax)
  
860-608-4559 (cell)
  
  
  
  

  
  
>   
> On Jan 30, 2018 at 8:25 AM,  <Brian Harris 
> (mailto:[email protected])>  wrote:
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> I have a calculation for a dry system that is currently -2.945 psi (-19.8%) 
> over the curve. My most demanding head is one of (2) heads on a 1” arm-over, 
> if I change the section of pipe (7’-6” long) that feeds this head to 1-1/4” 
> my calc changes to +24.168 psi (136.8%) under the curve. Seems fishy to me, 
> thoughts?
>
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>  Brian Harris, CET
>
>   
>
>  BVS Systems Inc.
>
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>  Design Manager
>
>   
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>   bvssystemsinc.com (http://bvssystemsinc.com/)
>
>   
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>  Phone: 704.896.9989
>
>   
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>  Fax: 704.896.1935
>
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