To fix a leaking shower valve, first shut off the water supply by closing the main valve or the shut-off valve near the shower. Remove the escutcheon plate and adjust the stem using a wrench. Inspect the valve seat and O-rings for damage or wear. Replace any damaged parts with a new shower valve repair kit. Reassemble the valve, turn the water back on, and test for leaks. If the leak persists, consider replacing the entire valve.

Leaking shower valves are common due to worn internal components like the valve seat, stem, or O-rings, which allow water to escape. According to the American Water Works Association (AWWA), approximately 30% of household water leaks stem from faulty plumbing fixtures, with shower valves being a frequent culprit. The Environmental Protection Agency (EPA) estimates that a single dripping showerhead can waste 3,000 gallons of water annually, highlighting the importance of timely repairs. Replacing damaged parts ensures a tight seal, preventing water waste and potential mold growth. Data from the EPA’s WaterSense program shows that fixing leaks can reduce household water bills by up to 10%, as leaks account for 10% of average household water usage. Proactive maintenance of shower valves not only saves money but also extends the lifespan of plumbing systems, reducing the need for costly replacements.