Technician arrived on site to replace a failing 1-inch ball valve installed on a PEX water line. Water supply was safely shut off and system pressure relieved before removal. The existing valve showed signs of wear and was no longer operating properly. Removed the old valve and installed a new 1-inch full-port ball valve approved for PEX piping using proper crimp connections. All fittings were secured, and the line was supported per code. Water was restored, the system was pressurized, and the new valve was tested for leaks and smooth operation.