When a toilet is flushed, why do my pipes make a very loud noise? Noise comes within the walls making it seem that they are in the ceiling. This does not happen with faucets or shower only one toilet.

I would guess that you have a bad fill valve on toilet, or possibly a loose washer on stop under toilet. I would start by replacing fill valve. Get a fluidmaster fill valve. If you need more info on this please let me know.

I'm with mygirlsdad77, cluna:

Which valve do you have in the toilet TANK? More like the picture on top ot the picture on the bottom... let us know. You may be able to check on or two things before replacing the unit... ;)

MARK