Have used Cougar Irrigation several times to work on system they did not originally install. The planned the current systems expansion a few years ago
This visit they Doug out roots and rocks from they did a $90 service call
Worked on the back flow box removing roots and rocks that prevented the eye strainer from being cleaned when the water was turned off in our neighborhood. Calcium particles are caught by this strainer - and before we have this installed would clog up the sprinkler heads. Two visits ago they install this to prevent that from happening again. The trick about that installation, is to make sure that The boxes is dug properly in the first place to make sure it's deep enough. Then the box to be lined with small gravel to prevent routes from climbing up towards the valve that needs to be rotated in order to be emptied.
This time we dug out the box properly and Shaun demonstrated how to clean the eye valve.