Review on Korky 5030BP Universal Toilet Flapper by Bryan Cavalcante

I did not use jackscrews, washers or red rubber grommet. I used old Champion 4 models, all I needed was a corky hose and a flapper. For Champion 4 toilets with a 4" flush valve connection, I recommend using this Champion 4 Tank and Bowl Connection Kit: US Standard 738756-0070A Tank and Bowl Connection Kit https://www.amazon.com/gp /product/B003H4BI3O/ They have better bolts with rubber grommets. The washers are also attached to the bolt so there is less fiddling with the details.