Customer has a rhythmic metallic sounding click in the wall by kitchen, usually late at night. Based on questions discussed with the customer, it doesn’t appear to correlate with direct water usage of any kind. Performed a pressure check and drop test for the prv. Pressure sits around 65 psi, but a lavatory faucet drops the pressure down to 50. Customer had questions about greening on the copper pipes in the basement. Pointed out areas in the middle of copper lines with spotting and explained they are potential leak point in the future. Left a quote for a Flo by Moen and a new PRV based on these first two observations. The tankless unit has a recirculation tee upstairs. When water is heating over night to recirculate it is likely causing thermal expansion in the home. This can lead to the clicking noise that was observed and recorded by the customer. Left a quote to install a thermal expansion tank also.
