| Do you mean the bowl is filling to the top or the tank? Its likely you have a clogged drain, could be in the toilets integral trap or further down. Start with a toilet auger, if that doesn't work then you may have to rod the line. Are there any other fixtures in use that may cause the bubbling? This may also be a clogged vent stack right at the drain line connection, rod from the roof with enough snake to reach roof top to basement plus 20' |