There an issue about the Polybutylene pipe, which had a lot of failure on while people are use it. Many people are actually using this type of pipe for their plumbing. It needed to be a replacement as fast as possible before the leaks are even worst. The Polybutylene pipe replacement is the solution. You need to replace it with copper pipes which stronger than Polybutylene pipes. Plastic are common use because of its flexible, good to use for simple piping such like drainage. The problem is Polybutylene cannot be use for long term.