I acquired a condo property 3 years ago with 94 units to service the irrigation. All units have their own water supply (tapped in the meter pit) and clocks ( in garage). They are right around 20 years old and every one has a river birch in the front corner near the house. These trees are quite large now and guess where the PVBs and valve boxes sit. I have had to reinstall systems on 4 units so far and capped off 3 ( plus countless other repairs) due to roots. It's been a good source of income but whoever installed these systems was not thinking ahead.