Calculating flow from one pipe size into another (radiant manifolds)
I have a general question regarding flow rates for pipes of varying diameters. Suppose I have a pipe that is 3/4" PEX that splits into 5 smaller pipes, say 1/2" PEX. How do you calculate the flow rate for the smaller pipe?
Here's a diagram:
I would prefer to have a formula or to understand how to make this calculation rather than just an answer to my specific example above.