So, our sprinkler system is a hodge podge of installations. And now I've found that one of the heads nearest the front door has been leaking and forming a rather large sink hole. I've turned off the water to that section of sprinklers and tonight I have to rip up the water line, terminate it at the next to last head and then fill the sink hole. I'm going to line the bottom of the hole with chicken wire, and then fill the hole up with rock and pebbles and then the last foot with earth. I'll be short a little sod, but I'll seed it. I don't even want to think what someone would charge me to do this.