Do you ignore the friction loss at tank entry to pipe? In fire pump situations 
you normally include this. Or is pipe so oversized this is ignored?

Best.

Bruce 

> On May 15, 2019, at 11:25, Vince Sabolik <[email protected]> wrote:
> 
> Height x .434 = Starting psi at top.
> 
> Less friction loss at flow (pick a flow)
> 
> Your flow test complete with a K factor!
> 
> 
> 
> 
> 
> 
>> On 5/15/2019 11:27 AM, Mike Stossel wrote:
>> I have an existing building with a sprinkler system that is supplied by a 
>> gravity tank located on the roof.  They are modifying the first floor of the 
>> building that will require hydraulic calculations.  Is it possible to 
>> mathematically create a waterflow test  accurately, or do you need to 
>> actually perform a water flow test at the 1st floor level?   
>>  
>> Mike Stossel SET
>> <image001.png>
>> 36 Barren Road
>> East Stroudsburg, PA 18302
>> Office: 973-670-2627
>> [email protected]
>>  
>> 
>> 
>> _______________________________________________
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> 
> 
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> Vince Sabolik
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