i am not a plumber but i do work at a plumber/contractor supply house. i think the menards ones are o.k. the bigger the flush valve the better it usually is. you may also want to look at the size of the trapway, (that is the intestine looking thing you see on the side of most toilets) if that is 2" or bigger it should work good. otherwise call a plumbing shop and see if you can buy an american standard or a gerber from them. the top of the line american standard is the champion model. the top of the line gerber is the viper model.