First let me say that I know zilch,zero, nothing about underground sprinklers. Yesterday while mowing thru some tall grass I took out one that was sticking up out of the ground. The mulcher made short work out of it. I wanted to know how much trouble are they to change? Do you have to do any cutting (into PVC) and reglue? I did not dig around it to look at it because it was raining hard at the time. The owner was not at home but I need to let them know. Will do it myself if its not difficult. This was not a high profit yard is what sux. Thanks. BTW, in 8 years of doing yard work this was my first one to hit, I always try to watch for the heads that are sticking up or stuck in the up position.