Thats really helpful in two ways, one it showed me methodology and I need to produce 1200 gpm @ 20 psi so I think we will need to do some more work to try and bring our factor of safety up.
The static pressure on the 8" main is 40 psi, the elevation is flat from the end of the existing mainline to the connection to the proposed hydrant. So you are saying I convert the static psi to head and model it as a reservoir?
The Hydrant test records indicate an observed flow of 821 gpm and indicate the available flow at residual 20 psi would be 1570 gpm. How do I use this to calculate the flow and residual PSI at the proposed hydrant 800 feet away on the same line.
There is a hydrant about 20 feet from the tie in point, I assume this is an appropriate place to test since it is the only place to do so. It would seem somewhat odd to use this though since the hydrant has a 3' orifice and is on a 6' inch line not an 8" like the mainline.
I have a similar problem. I need to install a hydrant on 850 LF of pipe at a new building. The 8" main I am connecting to is at 45 psi. I do not have flow information for this main. The hydrant is located at the same elevation as the main 850LF away. I used PSI to calculate head and it...
