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Kohler K-1821 Underscore 66" x 32" Drop In Soaking Bath Tub with Reversible Drain, Molded Lumbar Support, and Slotted Overflow

Item #: BCI1811194
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Product Details for the Kohler K-1821

This product has additional required/recommended options. To configure, add to your cart.

  • Installation Kit Recommended
  • Tub Waste Required

Tub Features:

  • Kohler bathtubs are fully covered under warranty for up to a year after installation
  • Tub is constructed from an Acrylic material making it strong and flex resistant
  • Underscore features a simple, crisp design that exudes understated style with a contemporary flair
  • Installs in a Under-mount or Drop-In configuration
  • Tub comes standard with molded lumbar support, furthering the user's comfort
  • Tub uses an overflow assembly - permitting the user to enjoy a deep soak without worrying about spillage
  • Product Meets or Exceeds the Following Codes and Standards: ASME, ANSI, CSA, ASTM, UL
  • Pair this bath with other products from the Underscore Collection for a coordinated elegant look in the bathroom

Product Technologies and Benefits:

  • Material - Acrylic - A strong, flex resistant material with a smooth finish that resists chipping and cracking, as well as being easy to clean.

Tub Specifications:

  • Overall Height: 22" (measured from the top of tub rim to the bottom of basin)
  • Overall Width: 32" (measured from back most to front most point on outer rim)
  • Overall Length: 66" (measured from left most to right most point on outer rim)
  • Basin Width (Bottom): 22-5/16" (back to front measurement of the bottom of basin walls)
  • Basin Length (Bottom): 44-1/2" (right to left measurement of the bottom of basin walls)
  • Basin Width (Top): 25-1/2" (back to front measurement of the top of basin walls)
  • Basin Length (Top): 59-5/8" (right to left measurement of the top of the basin walls)
  • Water Depth: 18" (depth of water at tub's maximum capacity)
  • Maximum Water Capacity: 85.8-gallons
  • Drain Location: Reversible
  • Drop-In Cutout Required: 64-1/2" X 30-1/2"

Variations On This Tub:

  • K-1821: This model
  • K-1821-W1: This model + Bask technology

About Kohler:

Gracious living is characterized by qualities of charm, good taste, generosity of spirit and the enhancement of nature. It is Kohler’s mission that you can improve your sense of gracious living with every experience you have with a Kohler product or service.

With everything that Kohler does it lives on the leading edge of design and technology, while maintaining a constant level of quality regardless of price. Kohler sets the standard of excellence in its field, and yet is constantly striving to improve.

From sustainable products in the kitchen and bath, to engines for lawn tractors and generators, to power systems that protect data centers and urban landscapes all over the world; this is what the Kohler Company is all about.

Our SKU: Kohler K-1821

This product is listed under the following manufacturer number(s):

  • Kohler K-1821-47
    Almond
  • Kohler K-1821-96
    Biscuit
  • Kohler K-1821-7*
    Black Black
  • Kohler K-1821-K4*
    Cashmere
  • Kohler K-1821-NY
    Dune
  • Kohler K-1821-95*
    Ice Grey
  • Kohler K-1821-33*
    Mexican Sand
  • Kohler K-1821-G9
    Sandbar
  • Kohler K-1821-58*
    Thunder Grey
  • Kohler K-1821-0
    White

*Denotes a finish or option that has been discontinued

5 Questions from the Community

Loading nanoRep

Can you use this tub like a 3 wall alcove tub with a shower?

The Kohler K-1821 is only for drop in applications, but the K-1121 can be alcoved.

How can i get insight into the angle for back support? Just had a chance to test the Kohler Mariposa and the back wis way too slanted. I like to sit more.

The Kohler K-1242 has a back angle of 38*degrees. The K-1821 has a 37*degree back angle. To sit up in a tub, I would purchasing the K-839. This provides more of a sitting up straight back support.

Is this really 85 gallon capacity?

The Kohler K-1821 has a Capacity: 85.8 gallons. Yes.

Why is some of the tubs in the Underscore collect ADA compliant and not others?

The Kohler K-1821 is much larger than the ADA version of this tub. The ADA version of this tub is not as deep and smaller: 60" in length x 30" wide x 19" deep.

Are the bottom of these tubs textured or smooth?

The Kohler K-1821 and K-1121 both appear to have smooth bottoms.

Technical Specs

Sub Category Soaking Bathtubs
Tile Flange No
Height 22
Basin Width 22.3125
ADA No
Theme Contemporary / Modern
Category Bathtubs
Capacity (Gallons) 85.8
Chromatherapy No
Apron Front No
Country Of Origin USA
Length 66
Overflow Height 18
Made in America Yes
Blower No
Product Weight 86
Handshower Included No
Number Of Bathers 1
Width 32
Tub Shape Rectangular
Material Acrylic
Drain Placement Left, Reversible, Right
Installation Type Drop In
Basin Length 44.5
Lighting No

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Build.com apologizes for any inconvenience. We'd just like to offer you the chance to save extra money while we adhere to manufacturers' MAP policies. Build.com is also working to educate manufacturers on how their policies impact customers and their buying behavior.

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