Introduction
This instruction manual provides important information regarding the installation, operation, and maintenance of your MEDUNJESS 39" Stone Resin Japanese Freestanding Soaking Tub with Seat, Model DU328-100. Please read this manual thoroughly before installation and use to ensure proper function and longevity of your product. Keep this manual for future reference.
Safety Information
Observe the following safety precautions to reduce the risk of injury or product damage:
- Ensure installation is performed by a qualified professional in accordance with local plumbing and building codes.
- Verify the floor structure can support the weight of the tub when filled with water and a person. The tub itself weighs approximately 300 lbs (for larger models, this 39" model will be less, but still substantial).
- Do not use abrasive cleaners or harsh chemicals on the tub surface, as this may cause damage.
- Avoid dropping heavy or sharp objects into the tub, which could cause chips or cracks.
- Always test water temperature before entering the tub to prevent scalding.
- Supervise children and individuals with limited mobility when using the bathtub.
Product Features
- Material: High-quality stone resin for durability and aesthetic appeal.
- Design: Deep soaking design with an integrated seat for comfort.
- Drainage: Toe-tap chrome right drain and slotted overflow for efficient water management.
- Finish: Elegant matte white finish.
- Certification: cUPC certified, ensuring compliance with safety standards.
- Heat Retention: Stone resin material provides good heat retention, keeping water warm for extended periods.
- Durability: Crack resistant, stain resistant, yellowing resistant, and repairable.
Setup and Installation
Professional installation is recommended for this product.
Pre-Installation Checklist:
- Inspect the tub for any damage prior to installation.
- Ensure all necessary plumbing connections (hot/cold water supply, drain) are available and correctly positioned.
- Confirm the floor is level and capable of supporting the tub's weight.
- Gather all required tools and materials as per your plumber's recommendations.
Installation Steps (General Guide):
- Positioning: Carefully place the tub in its desired location, ensuring proper clearance from walls and other fixtures.
- Drain Connection: Connect the tub's toe-tap drain assembly to the floor drain. Ensure all connections are watertight.
- Overflow Connection: Connect the integrated slotted overflow to the drain system.
- Water Supply (if applicable): If using a deck-mounted or wall-mounted faucet, ensure it is installed according to its own instructions and connected to the water supply.
- Leveling: Adjust the tub's feet (if present) to ensure it is perfectly level.
- Sealing: Apply a bead of silicone sealant around the base of the tub where it meets the floor to prevent water seepage.
- Test: Fill the tub with water and check for any leaks around the drain and overflow connections.

Image: Material composition and durability features of the stone resin tub.

Image: Comparison of solid surface hardness with other materials.

Image: Ergonomic design details for lumbar support.

Image: Heat retention properties of the resin stone material.

Image: Detailed dimensions of the bathtub (Model DU328-100).

Image: Overflow and drainage system diagram.
Operating Instructions
- Filling the Tub: Ensure the drain stopper is closed. Turn on the faucet to fill the tub with water to your desired level and temperature. The slotted overflow will prevent overfilling.
- Soaking: The integrated seat provides a comfortable position for deep soaking.
- Draining the Tub: To drain, press the toe-tap drain stopper to open it.
Maintenance and Care
Proper care will maintain the beauty and performance of your stone resin bathtub.
- Regular Cleaning: Clean the tub regularly with a soft cloth and mild, non-abrasive soap or cleaner. Rinse thoroughly with water after cleaning.
- Avoid Harsh Chemicals: Do not use abrasive powders, scouring pads, or cleaners containing ammonia, bleach, or acids, as these can damage the matte finish.
- Stain Removal: For stubborn stains, a non-abrasive liquid cleaner specifically designed for solid surfaces can be used. Always test on an inconspicuous area first.
- Repairing Scratches: Minor scratches or dull spots on the stone resin surface can often be repaired by gently sanding with fine-grit sandpaper (e.g., 2000-grit) followed by polishing with a non-abrasive polishing compound. Consult a professional for deeper damage.
- Preventing Yellowing: The material is designed to be yellowing resistant. Avoid prolonged exposure to direct sunlight if possible, though this is typically not an issue for indoor bathtubs.

Image: Repairing the tub surface with sandpaper polishing.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Water not draining properly | Drain stopper is stuck or clogged. | Check the toe-tap drain mechanism. Clear any debris or hair from the drain. |
| Leaks around drain connections | Loose connections or improper sealing. | Tighten all plumbing connections. Reapply silicone sealant if necessary. Contact a professional plumber. |
| Surface scratches or dull spots | Abrasion from cleaning or objects. | Follow the "Repairing Scratches" instructions in the Maintenance section. |
| Water temperature not maintained | External factors (e.g., cold room temperature, open windows). | Ensure bathroom is adequately heated. The stone resin material has good heat retention, but extreme conditions can affect it. |
Specifications
| Feature | Detail |
|---|---|
| Brand | MEDUNJESS |
| Model Number | DU328-100 |
| Color | Matte White |
| Material | Resin, Stone |
| Product Dimensions (L x W x H) | 39.37"L x 22.44"W x 29.53"H |
| Style | Modern |
| Finish Type | Matte |
| Installation Type | Freestanding |
| Shape | Rectangular (with rounded edges) |
| Certification | cUPC Certified |
Warranty and Support
For warranty information or technical support, please contact MEDUNJESS customer service. Retain your proof of purchase for warranty claims.
Contact: Refer to the MEDUNJESS official website or your purchase documentation for current contact details.







