Hi all, Need help determining what size diameter for some pipe. I just want someone to check my calculations, hopefully they're okay. I attached a quick sketch of the set up. Here are the knowns: Qmin = 4000gpm ΔP = 32psi L = 65ft e(roughness of commercial steel pipe) = 0.00015ft water properties: ν = 1.08x10-5 ft^2/s ρ = 1.94 slug/ft^3 Is it safe to assume since the discharge is below the source we can ignore the height change it and just pretend its a horizontal pipe? Take a look at my calculations in the excel sheet I attached. The first tab is an estimation for the diameter, the 2nd tab is sort of a recheck, estimating Flow given diameter. Thanks!