Does the WASHLET seat come with this toilet?

No. The WASHLET+ toilet is built to accept a compatible WASHLET seat, which is sold separately. You need the seat to get the bidet functions and remote control.

What rough-in does it need?

It uses a standard 12-inch rough-in, measured from the finished wall to the drain center. Check your existing rough-in before ordering.

How much water does the dual flush use?

The full flush uses 1.28 gallons and the light flush uses 0.9 gallons. That is lower than many older toilets on both settings.

Does it need electricity?

The toilet itself does not, but the WASHLET seat needs a nearby GFCI outlet. Plan the outlet before the floor and wall work.

Is it hard to install?

It installs like a standard two-piece toilet, but the two-piece assembly and the seat's water and power connections take extra time. A plumber is a reasonable choice if you are not handy.

How does it compare with a one-piece toilet?

A one-piece has fewer seams and is easier to wipe down, while this two-piece is lighter and simpler to move. Both use the same Tornado Flush and glaze.