Daniel K. provided our service. He arrived in a timely manner, explained what he would be doing, and went to work. He explained that the valves were not of good quality and we agreed for him to replace them. When the install was completed he checked our water pressure and was done. He was pleasant, informative, and kindly gave us a 10% senior discount, which we did not know what available. We are very, very pleased with his service and will recommend Black Mountain Plumbing to friends and neighbors..