Gary from The Pipe Doctor was amazing. As soon as he walked in the front door and I told him the bath shower faucet was leaking he said the cartridge in the shower handle needed to be cleaned. He knew exactly what the problem was and was very patient with me while I asked about other possibilities I had found on Google (which obviously makes me an expert). He just knew without a doubt what the problem was. He said if he could just clean the cartridge the price would be about half the cost of replacing the cartridge with a new one. I agreed to both options in case the new cartridge had somehow become damaged. Once in the bathroom, he was surprised that the faucet handle was brand new, it had just been installed within the last month. The plumber who installed the shower handle was not able to find the cause of the leak, I had called him when water leaked through the ceiling below after a shower. He just caulked around the chrome plate. Gary found the newly installed cartridge was clogged with pieces of pipe liner used by Fairfax Water. He pulled pieces out of the cartridge and then asked me to turn on the main water line for about 1 second to flush the line, I did this four times. After each of the first 3 flushes, he pulled liner out of the pipe. It ran clear after the fourth flush. The pieces measure from 1/2 inch to 2.5 inches long. He did not need to replace the cartridge as it had not been damaged. He suggested I contact Fairfax Water, ask if they had installed pipe liner recently in my neighborhood, and ask if they planned to flush the lines. He also suggested I ask Fairfax Water to reimburse me for the repair, which did but I would be very surprised if they agree to that. Gary said liner could still end up clogging other plumbing in my house, and this could be a problem for me and my neighbors for months, you just never know when the liner pieces will make their way through the pipes. Gary is a very upbeat, friendly, positive person. He explained to me every step of the way what he was doing, why, and what he found, as well as the cause. He said the problem was not due to something the last plumber did. I did send that plumber an email just so he would know what to look for if another customer called with a leaking faucet. I had called The Pipe Doctor several times before and once after Gary's visit. I am so forgetful, wish I remembered her name, because she was always friendly, courteous, and answered all my questions. I would like to thank her for all her help and patience. The Pipe Doctor is now my plumber, they are experts. Below is a link to a Fairfax County article on the installation of pipe liners throughout the county. [*** Link removed ***]