They started plumbing today and already went off of the plan slightly.
I have 3 36" water sheers. The installation guide says they need 36 GPMs each, and to use 1.5" piping if the runs are less than 60 feet from the pump and 2" pipes if the runs are over 60 feet (all of my runs over over 60 feet, closer to 100 feet each).
Each sheer will have a separate line back to the equipment pad.
I went out and checked the pipes after they left for the day and they are using 1.5" pipes instead of 2". They are about half way done with plumbing these. Does anyone have a feel if this is a big deal or if it should be fine? I tried to calculate the total dynamic head to see how that looked, but I am uncertain of (1) how I should handle the fact that the pipe splits into three pieces to feed all three water sheers, and secondarily, (2) if I should be using the total needed flow rate (36 GPMs x 3 = 108 GPM) or just the flow rate needed for each of the three pipes (36 GPM). Those two variables make a huge difference in the total dynamic head calculation, but I can't seem to find guidance on how to do the calculation for a split like this.
I have attached the pump schematic for reference.
Thanks!