For this customer, they are claiming that they hear a sound from the water heater. It’s making a clicking noise however, when I was there couldn’t find the source of the clicking noise. We hear a clicking noise at all however, the water pressure is at 80 psi the pressure gauge that I have is off by 20 pounds. In addition to that pressure reducing valve needs to be replaced. The customer has a recirculation pump on their water heater that also needs to be replaced due to the fact that it is no longer working and functioning properly in addition to that the water heater at the bottom near the Burner assembly on the inside has a lot of rust and water buildup around the tank however, it is not leaking on the outside of the tank. It is definitely leaking somewhere internally. Recommend you get everything replaced as soon as possible.