TOTO Connelly Square Undermount Bathroom Sink

Plan around an overall sink footprint of 17 x 17 x 7.5 inches, with an interior basin of 14.5 x 14.5 inches and a 5-5/8 inch basin depth. That means the bowl itself needs 14.5 inches clear in each direction below the counter, with the rim flange extending out to the 17 inch overall dimension for the mounting surface. Cut the counter opening from the template on the TOTO installation sheet rather than off these numbers, since undermount reveal is set by the fabricator.

No holes. The Connelly is a rimless undermount bowl with no faucet drilling, so the faucet mounts on the countertop or the wall behind it. That makes the faucet spread your decision, not the sink's: single hole, 4 inch centerset, or 8 inch widespread all work as long as the counter is drilled or the deck is prepped to match. Check that the spout reach clears the 17 inch outer edge and lands over the 14.5 inch bowl.

No, it is an undercounter fixture only. The Connelly mounts beneath the countertop with clips and adhesive against the underside of the deck, and it has no deck rim to sit on a cutout and no finished base to stand on a counter as a vessel. It needs a solid surface, quartz, or stone top thick enough to carry an undermount bowl. If the job wants a drop-in or vessel installation, this is the wrong model.

CEFIONTECT is TOTO's fired-on ceramic glaze that leaves a smoother bowl surface, so waste and mineral film have less to hold onto and the basin takes less scrubbing. It is an ordering choice on the Connelly, not a standard feature: models carrying it use the G in the part number, like LT491G#01 in Cotton White, while the non-glazed version drops the G, as in LT491#51 in Ebony. For high-traffic restrooms and MRO cleaning contracts the glazed version is the one to spec; the finish and dimensions are otherwise the same.

A square bowl like the Connelly gives more usable basin area for the same counter footprint, which is why it reads as generous at 14.5 x 14.5 inches inside a 17 inch outer dimension. The trade-off is corners: square inside radii collect soap film and take more attention from housekeeping, which is where the CEFIONTECT glazed version earns its keep in a high-traffic restroom. An oval or round undermount sheds debris toward the drain more naturally and is the easier maintenance choice if the design does not demand square lines.

Five colors: Cotton White, Colonial White, Bone, Sedona Beige, and Ebony. Each is available with or without the CEFIONTECT glaze, which gives ten orderable combinations. The glazed part numbers run LT491G#01 Cotton White, LT491G#03 Bone, LT491G#11 Colonial White, and LT491G#12 Sedona Beige; the ungrazed Ebony is LT491#51. If you are matching a bank of existing TOTO fixtures, order by the color suffix rather than the name, since Cotton White and Colonial White are distinct shades.

24 pounds. That is a two-hand lift on its own, but setting an undermount bowl means holding it up against the underside of the counter while the clips and adhesive take hold, so most installers do it with a support brace or a second set of hands rather than by arm strength. Plan the same way for tear-out on a replacement.