Hi all, I just bought an Am.Standard toilet, went to install and after testing i noticed a leak at a mounting bolt(tank to bowl) I question the type of gaskets as they just kinda look like a grommet. I'm normally used to rubber "washers". However this design of toilet does not have a tight fit between tank and bowl. It appears my tank is leaking thru the grommet seal. Any thoughts on what to do to solve this?