Thanks for the feedback. I agree with the calculations showing that we have inadequate pressure. We are working with the water agency to find a solution.
CPENG78,
That is what I suspected. The confusing thing is that in some cases the water agencies provide letters or certifications stating that 20 psi residual pressure is available with a specified fire flow. Unless they are specifically calculating it using the higher losses at the hydrants...
Yes, I agree. I ran all the numbers that the fire flow test provided and they all work out nicely. What I am struggling with is when we have the water district run the calculations and they provide their letter to the fire department, or when we use EPANET, I don't believe that this accounts...
I have a project with an existing 12" water main out front, and an existing fire hydrant coming off a 150-foot long 8" dead end main onsite. We are expanding the existing building and the plan checker has asked for calculations proving we have residual pressure of 20psi for a flow of 1500gpm at...
I have a project with an existing 12" water main out front, and an existing fire hydrant coming off a 150-foot long 8" dead end main onsite. We are expanding the existing building and the plan checker has asked for calculations proving we have residual pressure of 20psi for a flow of 1500gpm at...
