Customer stated that recirculation pump was making loud noise. Diagnosed issue and found that pump needed to be replaced due to debris stuck inside. Also tested pressure and pressure was above 80 psi. Removed old PRV and furnish and installed new one. Removed old pump and install installed new recirculation pump. Tested for proper operation and leaks. No leaks were present at this time and pump seem to be working at time of departure. Cleaned up work area.