We are also having significant problems with the Quest Piping in our home. Our downstairs was flooded with 3 inches of water several days ago. We have to replace the hard wood floors, carpet, drywall, and insullation in our downstairs. The plumber that came to our home told us that we have Quest Piping through our entire house and it should be replaced. I would appreciate any information you can give me on how to go about doing this.