Troubleshooting a leaky faucet makes sense when you consider the alternative: A single faucet that drips once per second can waste over 3,000 gallons of water in a year. Multiple dripping faucets in a home represent substantial expense literally going down the drain. Faucets come in several varieties today. The traditional “change the washer” remedy doesn’t apply in all cases anymore, but troubleshooting a leaky faucet can at least help separate the do-it-yourself projects from those that require a professional plumber.