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How to Install a Bathtub

A step-by-step guide for DIY bathtub installation.

Before You Begin: What You’ll Need

Gather these tools before starting your bathtub installation:

  • New KOHLER® bathtub
  • Tape measure
  • Level
  • Screwdriver or drill
  • Utility knife
  • Adjustable wrench
  • Silicone caulk or sealant
  • Two-by-fours or a platform frame (for drop-in models)
  • Drain and overflow assembly
  • Bucket and towels
  • Safety gear (gloves, safety glasses)
  • Optional: shims, ledger board (for alcove tubs)


Consult the product manual that comes with your bathtub to see if any other additional tools are required or search KOHLER service parts to find a specific part.

Step-by-Step: How to Install a Bathtub

Bathtub Styles

Kohler offers a wide range of bathtub styles designed to suit different bathroom layouts and design goals.

Freestanding

A statement piece that’s finished on all sides and accessible from every angle. Freestanding tubs create a striking focal point and bring a sense of luxury to any bathroom design.

Alcove

Ideal for saving space, alcove tubs fit between three walls and often include an integrated apron for a clean, streamlined look. Perfect for tub-and-shower combinations.

Drop-In

Designed for custom decks, these tubs have an unfinished exterior because the rim rests on the surrounding deck material. A great choice for whirlpools or baths with a tailored installation.

Materials

Choose a material that matches your style and performance needs.

Acrylic

Lightweight, durable, and easy to clean with a smooth finish that resists chips and cracks.

Enameled Cast Iron

Ultra-durable with a rich, glossy finish that retains heat and offers timeless appeal.

KOHLER® Lithocast®

Premium cast resin material with the look of stone that is warm to the touch and easy to maintain.

Special Features

Elevate your bathing experience with features that transform a simple soak into a spa-like retreat. Availability varies by model, and some features may require a licensed electrician and dedicated GFCI-protected circuits.

Hydrotherapy

Options like air baths and whirlpools harness water’s natural ability to soothe and restore.

Heated BubbleMassage™

Kohler’s signature air bath delivers a full-body massage with thousands of heated bubbles.

Bask® Heated Surfaces

Warm your neck, shoulders, and back with three adjustable heat settings for ultimate comfort.

Bathroom Articles

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