Introduction
This manual provides comprehensive instructions for the installation, operation, maintenance, and troubleshooting of your KOHLER Mariposa 66-Inch x 36-Inch Alcove Bath with Bask Heated Surface. Designed for comfort and durability, this bathtub features an hourglass shape, a slip-resistant bottom, and an integral tile flange. The integrated Bask heated surface offers adjustable warmth for enhanced relaxation.
Key features include:
- Bask™ heated surface for soothing warmth on your back and neck.
- Three adjustable heat settings to customize surface temperature.
- Elegant hourglass shape.
- Integral tile flange for simplified installation and water damage prevention.
- Textured bottom surface for improved safety.
Safety Information
Please read all instructions carefully before installation and use. Failure to follow these instructions could result in injury or property damage. Retain this manual for future reference.
- Ensure all electrical connections are made by a qualified electrician and comply with local codes.
- Do not operate the heated surface if the bath is empty.
- Avoid using abrasive cleaners or tools that could damage the acrylic surface.
- Always test water temperature before entering the bath.
Setup and Installation
The KOHLER Mariposa bath is designed for alcove installation. Proper installation is crucial for optimal performance and to prevent water damage.
Pre-Installation Checklist:
- Verify all components are present and undamaged.
- Ensure the installation area is level and structurally sound to support the weight of the filled bath and user.
- Confirm plumbing and electrical rough-ins are correctly positioned according to local codes and product specifications.
- Have necessary tools and materials ready (e.g., level, measuring tape, sealant, shims, mortar bed materials).
Installation Steps:
- Prepare the Alcove: Ensure the alcove walls are plumb and square. Frame the opening to the specified dimensions for the 66-inch x 36-inch bath.
- Install Drain Assembly: Attach the drain and overflow assembly to the bath according to the manufacturer's instructions. Ensure a watertight seal.
- Prepare Mortar Bed (Recommended): For optimal support and to prevent flexing, prepare a mortar bed on the subfloor where the bath will rest. This helps distribute the weight evenly.
- Position the Bath: Carefully lower the bath into the alcove, ensuring the integral tile flange rests against the wall studs. The right-hand drain should align with the prepared plumbing.
- Level the Bath: Use a level to ensure the bath rim is perfectly horizontal. Use shims if necessary under the bath's feet or mortar bed.
- Secure the Flange: Fasten the integral tile flange to the wall studs using appropriate fasteners. This secures the bath and helps prevent water from seeping behind the walls.
- Connect Plumbing: Connect the drain and overflow to the household plumbing system. Test for leaks before proceeding.
- Electrical Connection (Bask Heated Surface): Have a qualified electrician connect the Bask heated surface to a dedicated, ground-fault circuit interrupter (GFCI) protected circuit, following all local electrical codes.
- Finish Walls: Install wall coverings (e.g., tile) over the integral flange, ensuring a waterproof seal at the joint between the bath and the wall.

Figure 1: The KOHLER Mariposa Alcove Bath in Biscuit, showcasing its hourglass shape and integral flange. This image illustrates the overall design of the bathtub.
Operating Instructions
Using the Bask Heated Surface:
The Bask heated surface provides soothing warmth to your back and neck. It features three adjustable heat settings.
- Fill the Bath: Ensure the bath is filled with water before activating the heated surface. Do not operate the heated surface in an empty bath.
- Activate: Locate the control button for the Bask heated surface, typically on the rim of the bath. Press the button once to turn on the heating element.
- Adjust Heat Settings:
- Press the button once for the lowest heat setting.
- Press the button a second time for the medium heat setting.
- Press the button a third time for the highest heat setting.
- Deactivate: Press the button a fourth time to turn off the heated surface. The system will also automatically shut off after a set period for safety.
Allow a few minutes for the surface to reach the desired temperature. The warmth is designed to be gentle and comforting, not intensely hot.

Figure 2: Illustration of the Bask Heated Surface, highlighting the heating elements designed to provide warmth to the back and neck area of the bather. This image demonstrates the functionality of the heated surface.
Maintenance and Cleaning
Regular cleaning and proper maintenance will ensure the longevity and appearance of your KOHLER Mariposa bath.
General Cleaning:
- Use a soft cloth or sponge and a mild, non-abrasive cleaner specifically designed for acrylic surfaces.
- Rinse the bath thoroughly with clean water after cleaning to remove all cleaner residue.
- Avoid using abrasive cleaners, scouring pads, wire brushes, or harsh chemicals (e.g., acetone, paint thinner, strong acids/bases) as these can damage the acrylic finish and the heated surface components.
- For stubborn stains, consult KOHLER's recommended cleaning products for acrylic baths.
Heated Surface Care:
- Ensure the heated surface is off and cool before cleaning.
- Clean the area around the heated surface control button with a damp cloth.
- Do not submerge the control button or expose it to excessive water pressure.
Drain Maintenance:
- Periodically remove and clean the drain stopper to prevent hair and debris buildup.
- Use a non-corrosive drain cleaner if clogs occur, following the product's instructions carefully.
Troubleshooting
This section addresses common issues you might encounter with your KOHLER Mariposa bath. For problems not listed here, please contact KOHLER customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Bask Heated Surface not working. |
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| Water drains slowly. |
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| Leaks around drain or overflow. |
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Specifications
| Model Number: | 1229-RW-96 |
| Dimensions (Overall): | 68.88 x 39 x 23.75 inches (Length x Width x Height) |
| Nominal Size: | 66-Inch x 36-Inch |
| Material: | Acrylic |
| Installation Method: | Alcove |
| Drain Placement: | Right-Hand |
| Color: | Biscuit |
| Item Weight: | 83 pounds |
| Water Capacity: | 60 Or More Gallons |
| Heated Surface: | Bask™ (3 heat settings) |
| Included Components: | K-1229-RW-96 (Bath unit) |
Warranty Information
This KOHLER product is covered by a one-year limited warranty. For specific terms and conditions, please refer to the warranty documentation included with your purchase or visit the official KOHLER website. This warranty covers manufacturing defects and material flaws under normal use and service.
Customer Support
For further assistance, technical support, or to inquire about replacement parts, please contact KOHLER customer service. You can find contact information on the official KOHLER website or by referring to the documentation provided with your product.
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