To fix a leaking shower valve, first shut off the water supply to the house or bathroom. Remove the old valve using a wrench or spanner, then disassemble it to inspect the cartridge, O-rings, or seat. Clean any corrosion or debris and replace damaged parts. Reassemble the valve, ensuring a tight seal, and test for leaks by running the shower. If the issue persists, consider installing a new valve.

Leaky shower valves often result from worn-out components like cartridges or O-rings, which fail due to mineral buildup, corrosion, or temperature changes. According to the American Water Works Association (AWWA), approximately 15% of household water leaks originate from plumbing fixtures, with shower valves accounting for a significant portion. Corrosion is a primary cause, as calcium and magnesium deposits from hard water accumulate over time, weakening seals. The Environmental Protection Agency (EPA) estimates that a single dripping shower head can waste 10,000 gallons of water annually, highlighting the importance of timely repairs. Replacing faulty parts or the entire valve restores密封性 (sealing) and prevents water waste. Studies by the National Association of Home Builders (NAHB) show that proactive valve maintenance can reduce plumbing repair costs by up to 30%, as minor fixes are cheaper than major replacements. Additionally, addressing leaks promptly avoids potential water damage to walls, floors, and electrical systems, which the Insurance Institute for Property Losses (IIPLO) links to 25% of water-related insurance claims. By following these steps, homeowners can efficiently resolve leaks while saving water and money.