Customer requested installation of a new three-handle shower valve due to leaks and difficulty controlling water temperature. Shut off water supply and removed the old shower valve assembly. Installed a new three-handle shower valve, properly connecting hot, cold, and diverter lines. Secured all fittings, checked for leaks, and restored water service. Tested valve operation to ensure smooth handle movement, proper temperature control, and correct diverter function. Job completed successfully and shower is operating as intended.