We have an older Briggs one piece toilet. Says C-Briggs 12-12-1956. The inside must have been converted or is missing a part. When flushed no water comes out under the rim. There is a piece with nothing attached to it (see pic, part in red box) that if I put the little hose into, water comes out from under the rim but with no real force. It does not seem that it was made to be hooked up with the hose there. Any ideas on what I am missing? Thanks
