What is needed to calculate? Flow rate (gpm) and pressure?
As a guide how does the flow rate decrease as length increases? Does pipe material make a difference (i.e copper / speedfit)
i.e if water pressure is say 2bar, flow into pipe is 1gpm what would be flow be at the end of say (assuming no elbows, etc)
10,20,30 m of LLDPE tubing of inside diameter of 2.5mm,4mm,6mm,7mm,9mm,11.5mm