“Knock-Knock-Knock”
No, unfortunately this is not the beginning of a funny joke. It’s an indication of a problem with your water heater, though, if that’s where it’s coming from.
A tank water heater system may occasionally make this noise, and while sometimes it may be the symptom of something fairly benign that just requires a “quick” fix, other times it can be more serious. The fact is though, no sound coming from your water heater or any other home appliance should be ignored. A knocking noise very often indicates a problem that can only grow larger the longer you neglect it.
Keep reading to learn about a possible reason for this sound and what you should do about it.
In our previous post, we talked about signs to look for in your home that you may be in need of whole-house, or at least partial, 
