master shower valve leak

homeowner in the Woodlands TX. reach out to cal tex plumbing, they were having a problem where they keep noticing water in the floor of their shower back wall. cal tex plumbing tech arrived at location and started troubleshooting the problem, no visual leaks were found. owner agreed to open a small hole on wall directly behind the shower valve where the problem appeared to be. There were signs of water leaking but it was not an active leak! Upon opening the shower valve and and divert water to shower head, we notice a pinhole on copper pipe riser to shower head. homeowner decided to replace the whole valve since the existing one was the original to the house.

Location: The Woodlands, TX