A toilet that will not stop running, a water heater that has gone cold, or a dark stain spreading under a sink all need answers fast. This section covers toilets, faucets, showers and fixtures, drains and sewer lines, and pipes, fittings and leaks, plus garbage disposals and water pressure problems. It also walks through water heater maintenance and how to choose and replace a heater when repairs stop making sense. Start with the guide that matches your problem.