Performed leak detecting to customers system. Customer has a water leak on hot side of system. After opening drywall and exposing manifolds behind the water heater, kitchen sink and refrigerator we where able to determine customer has a leak on his 3/4 hot copper water line that goes from behind water heater to behind kitchen sink. This line feeds the kitchen sink as well as a secondary 1/2 line that feeds the upstairs master bathroom. Leak appears to be at the base of the kitchen cabinets under the concrete and flooring. Instead of having to remove flooring and jackhammer concrete I recommend performing a re route and running a new 3/4 PEX line from behind water heater over head in the ceiling and connecting back to the existing copper lines feeding the kitchen sink and master bathroom. Doing so will by pass the damaged 3/4 copper line under ground and will save not having to replace flooring. While performing leak detection it appeared that there is a slight change that their might b