A strange sound suddenly comes from your pipes—an odd and sometimes surprising knocking noise. Is your house haunted?
No … although plenty of people have jumped to this assumption since the invention of indoor plumbing. What you’re actually hearing is a phenomenon called water hammer. It’s a common occurrence, but it also indicates a problem in your plumbing you may need remedied by a professional plumber. Let’s take a closer look at the truth behind this ghostly occurrence…