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Question:

what GPM flow rate of water thru 1.5 (or 2) plastic tubing 2800'long with gravity drop of 80' ? Please ad?

Gravity head available = 80` -- Please advise.

Answer:

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Pressure Drop Online-Calculator Calculation output Flow medium:Water 20 °C / liquid Volume flow::34.95 gal/min Weight density:998.206 kg/m? Dynamic Viscosity:1001.61 10-6 kg/ms Element of pipe:circular Dimensions of element:Diameter of pipe D: 2 in. Length of pipe L: 3000 ft. Velocity of flow:3.57 ft./s Reynolds number:55078 Velocity of flow 2:- Reynolds number 2:- Flow:turbulent Absolute roughness:.03 mm Pipe friction number:0.02 Resistance coefficient:404.69 Resist eff.branching pipe:- Press.drop branch.pipe:- Pressure drop:4992.72 lbw./sq.ft. 34.67 psi Based on my experience with real systems, 30 - 35 gpm seems reasonable for a 2 pipe with 35 psi pressure drop. A 1.5 inch pipe will give much less, a little over half as much, as a 2 pipe.

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