Have a customer (my crew mows the yard) who recently had a sprinkler system installed. Although I install systems I had to pass on this one. I have yet to see it run but have questioned (to myself) the design of this system. 1. About 34,000 sq. ft. of lawn area 2. 1" service line and 1" meter in basement located 70 feet from street. 3. 80 psi static pressure. What I've seen installed: 1. 1" copper mainline (starts in basement to outside wall) to PVB then 1" PVC from outlet of PVB to mainline. 2. Entire mainline is 1" PVC (furthest valve grouping is 130') 3. 1" Poly for all lateral lines. What I think should have been installed: 1. 1 1/4" mainline to a RPA (the pvb that is installed is not above the highest head on system) 2. 1 1/4" copper from outlet side of RPA to the mailine in the ground. I hate seeing pvc exposed to the sun on the outlet side of vacuum breakers......looks bad, becomes brittle over time. 3. 1 1/4" PVC mainline....... 4. Should have installed 1 1/4" poly from electric valve to at least first head on each zone. Some lateral runs are 100' to 1st head! 5. My general thoughts are that the installer/designer undersized the mainline.......by increasing the mainline just 1 size over service line makes a huge difference in pressure losses and velocity....... Thoughts?