Search:

Jim,
The noise is not just a one time hammer sound but a persistent, random length, random time, machine gun series, that lasts 2,3,4 seconds at times and does this maybe for a half hour at a time...

I have an odd noise problem in my hot water line. It happens when my Furnace is running. I can place my hand around the hot water line right as it exits the water heater and can feel the pipe...

Another couple steps taken.
1. Drained the water heater tank to see if it would help the popping noises.
2. This helped because the WH now wants to run for quite a long period of time.
3. Match...

Terry,
That certainly makes sense. So then I should be able to test the theory of not having enough make up air by just opening the mechanical room door when the furnace and water heater are...

Thanks JimD and jimbo for the meaningful information.
The makeup air duct is indeed a direct connection to the outside.
No blockage and the length is only about 4-5 feet.
I will look into the...

Thank you Dana for pointing out the important and not so obvious particulars for not using the original metal vent pipe.
I will look into a couple brands of water heaters based on some of the other...

Hello from a old newbie.
This morning my wife uttered the feared "did you hear that?" I listened and figured out that the water heater was the culprit. It is now about 15 years old and probably...