Hope someone here knows how to figure what size pipe to run from well to small orchard. Not for sure the size of the submersible pump, but guess it pumps about 15 GPM based on my other wells at 35-50lbs pressure. I will tie into the 1 1/2" line leaving the small pressure tank at the well. The PVC will go 300' before branching to first set of trees and then 240' to the second set of trees. There will be a total of (100) 1 GPH emitters all on one zone. So thats 1.67 GPM when system is running. The emitters will be pressure compensating and punched into 1/2" polypipe. There will be a total of 1500' of the 1/2" poypipe. The ground surface is flat. Will 3/4" or 1' PVC be adequate for the job? thanks for any info...du