I would do what Paul said but I would take an additonal step of capping the sprinkler heads where they are easy to get to with a half dozen of 1/2" PVC caps. Then you are increasing the pressure ... read more
I have not heard of it and therefore not used it. I got a couple or favorable ratings on Yelp, could not find anything about it in Houzz or Pinterest.
HDR Remodeling Berkeley, ... read more