The answer to 'how does leak repair work' is that leak repair typically involves identifying the source of the leak, accessing the affected area, and sealing or replacing the damaged plumbing component. This can involve a variety of techniques depending on the type and location of the leak, such as tightening connections, applying sealant, or replacing washers, gaskets, or entire pipes.
Homeowners may be able to perform simple leak repairs themselves, such as tightening a faucet or replacing a worn washer. However, more complex leaks, such as those in hidden pipes or requiring the disassembly of fixtures, often require the expertise of a professional plumber. They have the necessary tools, knowledge, and experience to safely and effectively repair the leak and prevent further damage.