The track home builder installers around here usually dont even run a repair truck. They dont want to go back, because it will be a warranty call and they will loose more money. Most of the time the H/O is so pissed off about their system the last thing they are going to do is call the original installer. I get calls often (used to*) to repair systems that builders installed. The mainline is buried in the construction grade fill 3" from the foundation, every zone maxes out the 5/8 meter capabilities (good luck taking a shower with your system on). Fittings butted up to one another, etc...etc... A repair mans dream $$$$$ *there is a guy that recognized one of my install trucks from a picture on this site that called me up. Now I refer all repairs to him.