My lawn has an existing irrigation system that is not quite up to par. Last summer I had most of the heads replaced and this helped with coverage, but I still have some spots that are not getting the coverage they need. I currently have 4 zones, 2 in the front and 2 in the back. I want to add 2 zones to the front. Right now I have one zone on either side of the driveway. The side to the right of the driveway is large and has 5 heads in a "t" pattern. This is the side I want to add to. The problem is that the valves are on the other side of the driveway. One valve per zone. If I were to add another valve or two here I would then have to lay more pipe under the driveway and this would be very difficult to do, right. Any suggestions on how to add a zone or two to my system? I am running city water with no pump.

Thanks,

rob