Customer reported an unknown water leak that was soaking the carpet in the master bedroom. We previously installed the shower valve in the adjacent bathroom, so today I began by removing the shower valve trim to inspect the valve for any visible leaks. No active leak was found at the valve. With the customers approval, I open the wall behind the shower on the master bedroom side of further investigate. At that point, I located the source of the leak coming from the main waterline rising up from the slat. The piping was identified as polybutylene. I advised the customer that, due to the presence of polybutylene piping, the best long-term solution for peace of mind be a full home re-pipe to avoid future leaks and potential water damage. Replacement options for the entire home waterlines were discussed. At this time, Mrs. elected to proceed with repairing only the leaking section today and not move forward with a full re-pipe. The repair was completed and tested, and no further leaks