I just bought a home and the sprinkler system came with. The system has five Irritrol 311 valves spanning what appear be 10 zones. I first became aware of the problem when I noted that zones 1 through 4 and 6 through 9 all activate as expected. Given the logical progression with which the zones are activated, the sprinkler heads for zone 10 are obvious; I do not know where in the yard zone 5 is supposed to be, but open to the idea that it may be where I think zone 10 is located (as an outlier to...
