I have been in homebuilding 20+ years and worked for a major builder building 300+ homes a year. We converted to CVCP Flowguard in early/mid 90's. When I built my own home in 1996 I used CPVC Flowguard, because I thought it was the best product available. In the past week on two separate occassions I have woke up hearing water dripping/flowing in our finished lower level. On both occassions in the main section of pipe (not near a joint) there were a string of bumps (looks something like a string of poision ivy) and one of the bumps burst open shooting out water. I fixed one on Monday (still floating drywall mud) and another one today. The one today as I cut out a section of pipe (about 6" long) I noticed another section of bumps2-3" long (had not leaked there,yet) about 18" away. Therefore, I cut out the entire section. It is 3/4" line that reduces down to 1/2" when it goes to fixtures. The leak on Monday was probably 30' away from the leak that started last night sometime.
Has anyone had this problem? Concerned that will have another "burst" when we are gone, so we will start shutting of the water when we leave more than 24hours. Should I take out the drywall and replace all the pipe (seems like the only solution).