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Deal.ai › Kohler › Built-In Bathtubs
Kohler
Kohler Underscore (K-1834-0)

Kohler Underscore (K-1834-0)

Best price now

$1,844.96at Lowe'sChecked 10 h ago

Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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Price facts

  • Lowest price today: $1,844.96 at Lowe's (checked Nov 10, 2026).
  • Checked at 2 stores.

Our take on the Kohler Underscore (K-1834-0)

The Kohler Underscore K-1834-0 is a 72-inch rectangular acrylic soaking tub designed to drop into a built-in surround. Its 19.4-inch basin depth and roughly 113-gallon capacity make it one of the deeper alcove-style soaks in its class, and the acrylic shell keeps the tub lighter and warmer to the touch than cast iron. It suits remodelers who want a clean, straight-lined drop-in with a generous soak without the weight and installation cost of a cast iron tub. Against fiberglass tubs it feels more solid and holds heat better; against cast iron it trades some heft and scratch resistance for easier handling.

Best forPrimary bathroom remodelsDeep soaking in a built-in alcoveDrop-in installations with a custom surroundBuyers who want acrylic's warmth and lighter weight
Pros
  • Deep 19.4-inch basin for full-shoulder soaking
  • Large 72 x 36-inch footprint fits standard alcove builds
  • Acrylic holds water heat longer than cast iron
  • Overfill protection built in
  • Smooth, non-porous surface is easy to wipe down
Cons
  • No integral front or apron, so it needs a built-in surround
  • Acrylic can scratch and dull without care
  • Heavy when filled; the floor and framing must support it
  • No faucet or trim included

Kohler Underscore (K-1834-0) prices at every store

  • The Bold Look of KohlerNew

    In stock

    $1,844.96Checked 10 h ago
    Visit The Bold Look of Kohler
  • Lowe'sNew

    In stock

    $1,844.96Free shippingChecked 10 h ago
    Visit Lowe's

Store links may earn us a commission. Some prices via Klarna.

Kohler Underscore (K-1834-0) price history

Lowest price we've seen: $1,844.96 on Nov 10 at The Bold Look of Kohler. Tracked across 2 stores since Nov 10.

What reviewers say

Owners of the Underscore line generally praise the deep soak and the solid feel of the acrylic, and say it looks clean and modern once installed. Complaints tend to center on installation demands and on acrylic's susceptibility to scratches and scuffs over time.

What people mention
  • Soak depthPraisedOwners say the deep basin lets them soak up to the shoulders, which is the main reason they chose it.
  • Build feelPraisedReviewers describe the acrylic as feeling solid and quiet rather than flexing like thin fiberglass.
  • Heat retentionPraisedUsers report the water stays warm longer than in cast iron or thinner tubs.
  • InstallationMixedSome say it drops in cleanly with a proper surround, while others found the framing and leveling fussy.
  • ScratchingCriticisedA few owners report scuffs and dulling on the acrylic surface after regular use.

Specifications

Shape
RectangularSource
Color
WhiteSource
Material
AcrylicSource
Number of People (ppl.)
1Source
Width (")

Questions and answers

Does the Kohler Underscore K-1834-0 include a faucet or drain?
No. It is the tub shell only. You supply the faucet, drain and overflow trim separately.
Can it be installed as a freestanding tub?
No. It is a built-in drop-in model with no front apron, so it needs a surround or deck built around it.
How deep is the water?
The basin is about 19.4 inches deep, so it holds a deep soak well above ankle level.
Is acrylic durable enough for daily use?
Yes for normal use, but acrylic scratches more easily than cast iron. Avoid abrasive cleaners and use a cutting board or mat if you set things in the tub.
What size opening does it need?
It is 72 inches long and 36 inches wide, so the rough opening and surround should be framed to those dimensions with room for the rim.
Does it work for a two-person soak?
It is rated for one bather. The 36-inch width is comfortable for one but tight for two adults.
Where is the Kohler Underscore (K-1834-0) cheapest?
At Lowe's, for $1,844.96, as of our latest check.
Where can I buy the Kohler Underscore (K-1834-0)?
2 stores we checked sell it, including The Bold Look of Kohler, Lowe's.

Stores we've priced the Kohler Underscore (K-1834-0) at

  • Lowe's deals and prices

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36.0
Source
Type of Front
No FrontSource
Placement
Built-InSource
Volume (gal)
112.91Source
Faucet
NoSource
Height (")
23.0Source
Bathtub Depth (")
19.43Source
Features
Overfill Protection, Soaking TubSource
Length (")
72.0Source