If you effectively zero out mainline pressure losses with the upsized main line, you gain some pressure for the zones, which comes in handy.
Thanks. When I look at the charts for pipe size and psi loss 1 1/4" and 1/12" aren't much different. Since my well main line is 1 1/4" I will probably up the sprinkler to 1 1/2" to get the full gpm and psi from the pipe. I will have to reduce down to 1" at the vlvs and then run 1" laterals to the heads, 7 heads @ 2.5gpm for a total of 17.5gpmGPM @ 50psi. If it works this way I should be able to adjust the nozzles and get the well pump to run constantly at the 50psi and 17GPM.
Thanks