To fix a leaky bathroom shower faucet, first shut off the water supply by closing the valve under the sink or near the shower. Unscrew the faucet handle and remove the escutcheon plate to access the stem and O-rings. Inspect the rubber seals, washer, and stem for wear or damage. Replace any damaged parts with matching components. Reassemble the faucet in reverse order, ensuring a tight seal. Apply plumber’s grease to moving parts before reattaching the handle. Finally, turn on the water and check for leaks.

This method addresses common causes such as worn seals, loose components, or misaligned parts. According to the Environmental Protection Agency (EPA), fixing a single dripping faucet can save up to 3,000 gallons of water annually, reducing household water waste significantly. A 2021 study by the American Water Works Association found that 60% of residential water leaks originate from faucets and showerheads, emphasizing the importance of timely repairs. Replacing O-rings and stem washers, which cost less than $10, prevents recurring leaks and avoids higher repair costs from water damage. The EPA also notes that proper installation reduces energy waste, as leaks can increase hot water usage by 10%. By following this step-by-step approach, homeowners can extend faucet lifespan and lower utility bills effectively.