Many homeowners notice that plumbing noise becomes more prominent at night. Sounds such as knocking, ticking, banging, humming, or rushing water often seem louder when the building is quiet. While ...

Q: Recently, I’ve noticed my hot water heater making an unusual noise that I’ve never heard before, and I’m not sure if it’s serious. Why is mywater heater noisy, and should I be worried about it? A: ...