Completed plumbing repairs at a residential property including removal and replacement of a faulty angle stop at the kitchen sink. Installed a new quarter-turn angle stop to ensure reliable shut-off and improved water control. Replaced an outdated valve with a new ball valve for better durability and smoother operation on the water supply line. Cut out and replaced a leaking solder tee fitting, properly cleaned, prepped, and soldered connections to restore full integrity of the copper piping system. Tested all connections under pressure to confirm no leaks and proper water flow to the kitchen sink. System is operating correctly.