The system design point was 60psi and we measured 90sps so we dug and glued and started to backfill. Now(hopefully not to late) we begin to realize that the city inspectors look for excessive misty overspray. Since most of these head indicate a 30 psi rating(4" pop-ups) I assume at 90psi we got a problem. What are my best options? This is a very large system on a 4 acre lot and 2" water line around property... Some of the options I can think of are: 1. Put a pressure control device like a Wlkens BR-4 at meter 2. Turn down the valves...don't understand this very well 3. Get these special heads with pressure control in them(just made aware of these by distributor). Apparently costly.