Determing GPM through PVC pipe (Gravity Drains)

Does anyone know the equation to find the flow rate, in GPM, of water through a vertical pvc pipe? No pump, just gravity.
 
1,352
349
depends on the accuracy required for your answer. first approximation: the kinetic energy (velocity) at the bottom equals the loss of potential energy from top to bottom. that neglects friction losses. Try googling 'bernoulli equation' and 'moody friction' for more details.
 

The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top