I got a quote in the beginning of the summer for an irrigation system installed at my house. I'm not sure the reputability of the installer, but when he came out and gave a quote, he checked my pressure at a hose bib outside. If I remember correctly, it was about 45 psi. The pressure jumped up to about 60 and fluctuated back down to 45 on the gauge. My house is a new construction and fed by a 1" line to the meter. I am also a block away from a water tower. I have a pretty large front yard measuring about 160x100. What would you guys say a good estimate of zones & sprinklers/zone would be required for this size area with the information provided? Just want to get an idea of whether or not this guy knows what he's doing before going any further.