Meet the Champion® 4, the undisputed leader in high performance toilets. With the industry's widest 2 3/8" trapway and 4" flush valve, it virtually eliminated clogged toilets for homeowners and call backs for plumbers. The Champion 4 will move a mass 70% larger than the industry standard. It achieves the highest bulk removal rating of 1,000 grams and will even flush a bucket of golf balls! Which means you can flush with confidence!