Homeowner had issue with squealing every time she ran water. Technician could not recreate. Technician informed homeowner that PRV diaphragm could be going bad. Technician left estimate to replace PRV. Install new 10 year Rheem 50 gallon water heater. Install all code compliant upgrades. Installed new main shut off valve. Installed new cartridge for master bathroom shower. Installed new washer, box and hammer arrester for dishwasher to combat water hammer. Checked and tested for leaks.