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The Kohler Underscore is a 60 by 30 inch acrylic alcove tub with an integral apron and flange, so it drops into a three-wall alcove and looks finished without extra trim. Its slotted overflow lets you fill the water line higher than a standard overflow, and the backrest has built-in lumbar support. The step-over height is 19 inches instead of the usual 21, which makes it easier to climb into, and it is ADA compliant. It is a solid pick for a standard alcove remodel or an aging-in-place bathroom; the trade-off is acrylic, which holds heat less well than cast iron and feels lighter underfoot, and the drain is sold separately.
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Lowest price we've seen: $1,096.83 on Nov 10 at Easy Plumbing. Tracked across 10 stores since Nov 10.
Owners rate it well overall and most praise the comfortable backrest, the deeper water level from the slotted overflow and the clean built-in apron look. Complaints center on acrylic flex and heat loss, and a few mention the separate drain purchase.
The Kohler Underscore is a 60 in. x 30 in. alcove bath made of acrylic. It has an integral apron that gives the front a clean, finished look. An integral flange helps keep water from seeping behind the wall and simplifies alcove installation.
The slotted overflow allows for deeper soaking. Integral lumbar support and a gently sloped backrest add comfort, and the bottom surface is textured.
The step-over height is 19 in., which keeps the same bathing depth as a standard 21 in. bath. The bath has a left-hand drain and is ADA compliant. It is suitable for residential use and is covered by the Kohler Plastic Baths and Shower Bases Lifetime Limited Warranty.
