Some back ground info - I am designing an irrigation system for a park (8.62 acres); the current PVB is about 400 ft from the 1.5" meter and the line from the meter to the PVB is 2" sch. 40. The meter is coming off of a 6" city main line. I put two different pressure gauges on test **** one of the PVB and get 68 psi. I even tried putting a gauge on test **** two and got a close reading. I call the city water dept for verification of water pressure and they tell me the most pressure to that area is 55 psi. Am I missing something here?