Herbie overflow tuning

[sphelps]

Originally Posted by HaZRaTTy

Here you go for number reference.

http://flexpvc.com/WaterFlowBasedOnPipeSize.shtml


Looks like the numbers were slightly higher.

Not an overly accurate chart to use for our applications, especially seeing how it's based on 100 feet of pipe.

For example using a 1" pipe with a pressure drop of 4 feet will give an initial entrance velocity of about 16 f/s meaning before you consider pipe friction you'll get about 2300GPH. You can calculate your friction losses by yourself but you're not going to loose much more more than 25%.