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Estimating water flow from sprinkler main drain

Estimating water flow from sprinkler main drain

Estimating water flow from sprinkler main drain

(OP)
Does anyone know how to calculate the K-factor (orifice opening) on a 2-inch main drain? I am trying to determine the water flow from the main drain at any given (static) pressure. I figured using the sprinkler formula Q=k*p^1/2 would be a close approximation.  It is not for hydraulic calculations, but just to find out how much water is going down the drain during a test. Please help. Thx.

RE: Estimating water flow from sprinkler main drain

there is one for open butt

I keep hearing that gpm calculations from main drain is not to accurate, but for what you are doing should work.



have to find the formula if you have access to a fire protection handbook will be there

RE: Estimating water flow from sprinkler main drain

k=40.1

Just a guess...


 

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