Kohler Underscore 66" Undermount Soaking Bathtub & Reviews

Underscore 66" Undermount Soaking Bathtub, Biscuit

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Biscuit

Featuring a simple, crisp design, this KOHLER® Underscore 66" x 32" rectangular drop-in bath exudes understated style with contemporary flair. The sloped backrest offers extra comfort and support during your soak. At Kohler, we make it our business to help you create the bathroom space of your dreams.

Features

Bath Therapy Type

Soaking

Product Type

Back to Wall

Overall Shape

Rectangle

Material

Acrylic

Tank/Tub Capacity

85.8 gallons

Construction Features

Overflow Hole

Overall Capacity

85.8 gallons

Specifications

Safety Listing(s)

CSA Certified

Plumbing Material Performance Compliant

CSA B45.5 / IAPMO Z124 - Plastics - Acrylic, Fiberglass, Resin Composites

Assembly

Mounting / Installation

Undermount, Mounting / Installation Required

Drain Placement

Left, Right

Overall Dimensions

22'' H X 66'' L

Overall Length from End to End

66'' L

Overall Product Weight

86 lb.

Overall Height from Top to Bottom

22'' H

Overall Width from Front to Back

32'' W

Soaking Depth - Top to Bottom

18'' D

Extended Holiday Return Policy

For all items purchased now through December 31, the deadline to return has been extended until January 31. Exclusions apply.

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Customer Reviews

Rated 4.8 out of 5 stars.

21 Reviews

Our Community Says

Customers praise the product's attractive appearance and clean lines, with one reviewer noting the Thunder Gray color provides a high-end look. The tub is also noted for its generous size, being deep enough to fit two people comfortably.

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Showing 1-5 of 21 reviews

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Rated 5 out of 5 stars.

DesireeDavie, FL

Color:Thunder Gray

Absolutely amazing design. The Thunder Gray color gives such a high-end look to my design.

10/09/2022

Rated 3 out of 5 stars.

CheriSnohomish, WA

Color:White

It’s a nice tub, but I wish Wayfair would have put more descriptive pics on it regarding the sloperecline on the back. I like the tub, I just don’t love it. I don’t love the slant and where the bend begins.

10/27/2019

Rated 5 out of 5 stars.

RitaMississauga, ON

Color:White

Perfect , nice size soaker. can’t wait to have it installed

02/25/2022

Rated 5 out of 5 stars.

PaulVA

Color:Thunder Gray

Love the gray color. Delivery was awesome and fast. Haven’t installed it yet. So far everything has been great.

08/19/2025

Rated 5 out of 5 stars.

Linda

Color:White

This is the deepest tub I could find, so glad I could get it a little bit longer also. Fits the two of us face to face!

08/11/2023

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Overview

Details

Dimensions

What We Offer

Underscore 66" Undermount Soaking Bathtub

Features

Bath Therapy Type

Product Type

Overall Shape

Material

Tank/Tub Capacity

Construction Features

Overall Capacity

Specifications

Safety Listing(s)

Plumbing Material Performance Compliant

Assembly

Mounting / Installation

Drain Placement

Warranty

Commercial Warranty

Warranty

Part Number

K-1821-96

Overall Dimensions

Overall Length from End to End

Overall Product Weight

Overall Height from Top to Bottom

Overall Width from Front to Back

Soaking Depth - Top to Bottom

Additional Documents

Extended Holiday Return Policy

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