I have a unique problem, my kitchen sink faucet drips after running the shower in the first floor bathroom. The sink will continue to drip for an undetermined amount of time or until I turn both the hot and cold water on full for about 10 seconds. I'm thinking that it is a pressure thing but I'm not sure how to resolve it. The house uses an electric hot water heater and the unit is only 4 years old and is located in the basement. Any ideas????