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  1. Civilchica

    Fire hydrant flow calculation - manual

    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.
  2. Civilchica

    Manual fire hydrant calculation

    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...
  3. Civilchica

    Manual fire hydrant calculation

    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...
  4. Civilchica

    Manual fire hydrant calculation

    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...
  5. Civilchica

    Fire hydrant flow calculation - manual

    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...

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