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
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
Just a guess...
RE: Estimating water flow from sprinkler main drain
RE: Estimating water flow from sprinkler main drain
29.83 x d2 x √P x C = gpm
Where:
d = Inside diameter of the opening (in inches)
P = Pitot pressure, and
C = Friction coefficient
http:/
RE: Estimating water flow from sprinkler main drain