: When I flush basement toilet just as the bowl is about full there is a terrible rattle. Only does it on in the basement toilet.
: It always rattles everytime and sounds like an air leak.Would appreciate hint on what to do to get rid of the very loud rattle. Thank you

Check the page link below. It may help to replace your fill valve (ball cock) with a Fluidmaster.

• 5. Why is my toilet so noisy while it refills?