We met with the homeowner, Lisa, who reported a hammering or knocking noise coming from the attic area. We entered the attic and inspected all visible plumbing lines. Our previous work was found to be strapped properly and showed no signs of loose or unsupported piping. However, as a precautionary measure, we installed additional pipe straps to ensure maximum stability and to rule out any movement. After strapping the lines, the hammering noise continued. We traced the sound and determined that it was most likely coming from the shower valve located in the hall bathroom. Based on the symptoms, we believe the cartridge inside the valve and the integral stops may be failing and contributing to the noise issue. Additionally, we inspected the master shower valve and confirmed that it is also in need of internal repairs. However, parts for that valve are currently unavailable. We advised Lisa that a separate quote will be provided for the master valve once compatible components are locate