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The Underscore is a 60 x 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 19-inch step-over is lower than a standard 21-inch tub while keeping the same basin depth, and a slotted overflow lets you fill it higher. The sloped backrest with lumbar support and textured floor are the comfort touches. It is ADA compliant, which suits aging-in-place bathrooms and anyone who wants an easier step in. Against cast iron and heavier acrylic tubs it is light at 70 lb and easier to set, but it needs a KOHLER Clearflo slotted drain sold separately, and the acrylic surface is more prone to scratching than enameled cast iron.
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Lowest price we've seen: $1,096.83 on Nov 10 at Easy Plumbing. Tracked across 12 stores since Nov 10.
Owners rate it well overall and most praise the comfortable backrest, the deeper soak from the slotted overflow, and how cleanly the apron and flange finish an alcove. Complaints center on the drain being extra, acrylic scratching, and flex or creaking underfoot when it is not set in a mortar bed.
The KOHLER Underscore is a 60" x 30" alcove bath made of acrylic. It has an integral apron and an integral flange. The apron gives the front a clean, finished look, and the flange helps keep water from seeping behind the wall and simplifies alcove installation.
The slotted overflow allows for a deeper soak. A gently sloped backrest with integral lumbar support adds comfort, and the bottom surface is textured. The step-over height is 19", and the bath keeps the same depth as a standard 21" bath.
The bath is ADA compliant and suitable for residential use. It uses a left-hand drain and is covered by the KOHLER Plastic Baths and Shower Bases Lifetime Limited Warranty.
