TOTO 19-11/16" x 13-3/4" Oval Undermount Bathroom Sink

Yes. The LT546 oval undermount lavatory is ADA compliant, which is what a government, healthcare, education or multi-family spec usually calls for at accessible fixture locations. The basin is rimless and mounts under the counter, so the counter itself sets the rim height and knee clearance in your rough-in.

Overall the fixture runs 21-5/8 x 15-3/4 x 7-5/16 inches, with a basin measuring 19.6785 x 13.75 inches. Size your counter cutout from the basin figures and the template on the TOTO installation sheet, and allow at least 7-5/16 inches of vertical space below the deck for the bowl before you get to the trap. It weighs 20.8 pounds, so it is a two-person set with clips or a support frame under a stone top.

No holes. Faucet hole spacing is None, because an undermount bowl puts the faucet in the countertop, not the china. You drill the deck for whatever you are using, single hole, 4 inch centerset or 8 inch widespread, and the sink imposes no limit on that choice.

Overflow is at the rear of the bowl. That means you want a pop-up or grid drain built for an overflow sink, with the side ports open, not a sealed no-overflow drain. A drain without the ports will block the overflow channel and the bowl will back up past the rim in a stuck-valve situation.

Same bowl, different glaze. The G suffix carries CEFIONTECT, TOTO's ceramic glaze that keeps waste from adhering to the surface so the bowl stays cleaner between cleanings. The plain LT546 is the identical oval undermount without it. Dimensions, rear overflow and undercounter mounting are the same either way, so the choice is purely about cleaning labor, which is why high-traffic restrooms tend to go with the G.

Five: Cotton White (#01), Bone (#03), Colonial White (#11), Sedona Beige (#12) and Ebony (#51). Each is offered with or without the CEFIONTECT glaze, so a property standardizing across a building can hold one color code and still mix glazed and unglazed bowls by budget. Ordered glazed, the part numbers read LT546G#01, #03, #11, #12.

Undermount is the call when the countertop is already solid surface, quartz or stone and you want the deck wipeable straight into the bowl with no rim to catch grit. The LT546 is an undercounter fixture, so it needs a finished, sealed cutout edge and clips or a frame carrying 20.8 pounds of china from below. If the counter is laminate, or if you are dropping a bowl into an existing cutout without refinishing the edge, a self-rimming drop-in or a pedestal is the easier fixture. Undermount also means the faucet drills into the counter, which is a fabricator decision, not a fixture one.

The bowl is china only. You supply the faucet, the drain assembly (overflow type, to match the rear overflow), the P-trap and supplies, and the mounting clips or support frame for the undercounter set. There is no battery or powered component in it, so nothing electrical is involved even in a restroom running sensor faucets, those are powered at the faucet. The TOTO installation and spec sheets give the rough-in and the cutout template.

Match on the color code in the part number and on whether the existing bowls are glazed. An LT546G#03 is the Bone bowl with CEFIONTECT; LT546#51 is Ebony without it. Because the oval is the same shape and the same 21-5/8 x 15-3/4 x 7-5/16 inch fixture across every color and both glaze options, any of them drops into the existing counter cutout. The glaze does not change the shape, only how the surface behaves, though a new glazed bowl next to older unglazed ones can read slightly different in gloss.

The basin is 19.6785 x 13.75 inches with a large backsplash area and a rear overflow, which is a generous oval for a commercial lavatory rather than a small powder-room bowl. In glazed LT546G form the CEFIONTECT surface is what makes it hold up visually under high traffic, since soil does not stick to the ceramic the way it does on plain glaze.