Does the Kohler Highline come with a seat?

Some listings include a plastic seat and others do not, so check the specific listing. Kohler sells seats separately if yours does not include one.

What rough-in does it need?

It uses a standard 12-inch rough-in, measured from the finished wall to the center of the drain. Measure before ordering, since a 10- or 14-inch rough-in needs a different model.

Is it a dual-flush toilet?

No. It is a single-flush gravity toilet at 1.28 gallons per flush. If you want dual flush, look at other Kohler lines.

How tall is the bowl?

It is a comfort-height model, taller than a standard toilet, which suits adults and people with knee or back issues. The overall height is about 33-1/4 inches.

Is a supply line included?

No. The supply line is not included, so buy one separately. The left-hand polished chrome trip lever and mounting hardware are included.

Is it hard to install?

It is a standard floor-mounted two-piece toilet, so a confident DIYer can install it. The 111-pound shipping weight means you will want help lifting the box.