Hi wetboots.
Property is 1 acre, in southern california - no freezing. 16 zones. Zone gpm is (for zones 1 to 16) 0, 31, 14, 19, 30, 45, 18, 25, 56, 20, 0, 45, 75, 30, 30, 17. (zone 1 is disabled, zone 11 is only 2 heads so too low to bother measuring). Zones 11 thru 15 are fed direct from incoming water main - appears to be 1.25in pvc at first valve, 1" at others. Other zones are through PVB near house. Probably installed at different times. Main line to/from PVB is 1.5inch. Water meter is labelled 1 to 1.5", line is definitely bigger than 1" so probably 1.5". Controller is Hunter ICC. Have 1 zone which is marginal pressure at end and cannot tolerate any pressure reduction. This is fixable as it is 26 heads over 200ft of 1" with a 12ft rise in height. Valve is at _far_ end with 1" line running out to valve. Could easily be fed mid-way by moving valve back to the 1.25" line. But it all consumes time
Thanks!