The answer to 'what causes leak repair' is that leaks can be caused by a variety of issues, including worn or damaged pipes, faulty plumbing fixtures, and even changes in water pressure or temperature. Leaks can occur in the walls, floors, or under sinks, and can lead to water damage, mold growth, and other costly problems if not addressed promptly.
Some common causes of leaks include cracked or corroded pipes, loose fittings, damaged washers or O-rings in faucets, and issues with the water heater or other appliances. Leaks can also be caused by changes in the home's structure, such as shifting foundations or settling, which can put stress on the plumbing system.