Once the bowl is in place, it’s time to install the tank. First, remove the nut, washer and grommet from the fill-valve inlet. Next, install the large tank gasket over the outlet on the tank so that the octagonal shapes align with each other. Delta toilets feature the exclusive SmartFit tank-to-bowl connection.
Utilizing a metal bracket on the bottom of the tank to secure the bolts to the bowl, the SmartFit tank-to-bowl connection eliminates the need for holes typically found in the bottom of the tank. This reduces potential leak points and is intended to prevent overtightening of the fasteners and cracking of the porcelain on the toilet. For your convenience, the three bolts are preassembled on the mounting plate.
Align the three mounting bolts on the tank with the mounting holes on the toilet bowl. Slide the bolts into the mounting holes, and ensure the tank gasket is in the water inlet on the bowl. Install the washers and nuts onto the tank mounting bolts from the underside. Make sure the tank is square with the wall, then tighten the mounting nuts with the provided wrench tool. Alternate bolts while tightening until the tank fits snugly against the bowl. Be careful not to overtighten.