Any plumbers that can solve a mystery?

[allamericaninfidel]

Probably isn’t a vent stack but it couldn’t hurt to check to be sure you don’t have some dirt dobbers or a birds nest

Is the noise coming from the wall or the toilet itself ?

Does the noise stopped after the toilet reservoir downstairs refills ?

If so my guess would be the fill valve is malfunctioning and needs to be replaced

 

[Plumminfool]

City water or well?

 

[boomer]

If the problem is just from one fixture, it may be a loose washer on the fixture that causes the sound. It is not a waste and vent problem!

 

[boomer]

Sounds like your pressure reducing valve needs to be replaced. If it’s bad it can beat, bang, rattle, and make some god awful noises

IF that was the case it would be happening all over the house no matter what fixture they used.

 

[ARCman47]

Sounds like you need a vent pipe clean out...

That's what she said

 

[hamburglar3]

post a video with the sound

 

[Adamjen15]

IF that was the case it would be happening all over the house no matter what fixture they used.

I would check the pressure though because I’m sure the basement water is caught before the upstairs. He said when he runs something upstairs it stops because it reduces the whole house pressure. It’s really hard to tell without being there though.

 

[Kahrnut]

post a video with the sound

 

[ARCman47]

Lmfao!!!

 

[The Southern Gentlemen]

Try opening all of the shut off valves all the way open. I had a similar issue in my hall bath late one night/ early one morning I was awoken to what sounded like my house falling down. The whole house was shaking and the noise was like a tornado . It ended up being the valve wasn’t opened up all the way and only happened when the toilet was filling