Just bought a new house that has a finished bathroom in the basement. Unfortunately, the toilet in this bath has a flushing problem. When flushed the water rises up near the rim and then flushes out, sort of. It usually takes about 3 flushes to change the water over entirely. Although relatively new, the toilet must be ridiculously cheap because it lacks a main port. I am wondering if the main port is likely the cause of this flushing problem or if perhaps it is gravity related. Base on all my observations, the sewer line is still below this toilet, so I would think that the gravity is not an issue. Will a new and better toilet solve this problem? Thanks for the help.