Secure the Toilet and Finish Installation
Set the assembled toilet onto the flange assembly, making sure that the closet bolts protruding from the floor line up with the holes in the base. Lightly press the toilet in place to form a good seal with the wax ring.
Place a couple of washers and a nut on each bolt. Secure the nuts with a small wrench, but don't over tighten them. If the bolts extend too far over the top of the washers and nuts, cut off the excess with a hacksaw.
Pop the trim caps in place to cover the ends of the bolts.
Secure the new seat and lid to the bowl with mounting bolts.
Use slip-joint pliers to reconnect the supply line to the bottom of the tank.
Keeping toilets in good repair will save you money. Even a small leak may waste as much as 40 gallons of water per day.