Cut Sheetrock and removed old improperly installed shower valve. Replaced CPVC plastic water piping with copper and connected to original copper lines. Installed new Delta tub and shower valve with new Chrome trim. Closed all necessary piping penetrations with silicone sealant. Installed new backing in wall for proper securing of shower valve. Cut additional Sheetrock and installed panel to allow easier access to plumbing for any repairs necessary in future.