I had GA Delta Mechanical re-plumb my house in December 2012. I delayed this work for several years because I was worried about the cost and disruption required to replace my polybutylene pipe. It's a little expensive and there's simply no getting around that. But, I was pleasantly surprised with how quickly they re-plumbed my two story, on a slab house. They warned it could take the whole week. They finished their work inside of three days. And, you can't even tell where and how they replaced the old plumbing. Not only did I receive a pipe upgrade, they installed an incoming service pressure regulator which was not part of the original construction. Also, my cut-off valve was buried inside a kitchen cabinet. They relocated this valve to a more accessible location. I had no idea how screwed-up my system was until the Technicians pointed out and corrected these flaws. My system is performing noticeably better and has been providing excellent service for almost six months. Also, my water bill has dramatically decreased. If I had known it was going to be this painless and professionally handled, I would have scheduled the job long ago.