1. Introduction
Thank you for choosing the Onebook Portable Foldable Bathtub. This product is designed to provide a versatile bathing solution for adults, suitable for both hot soaking and ice bath therapy. Its foldable design allows for easy storage and portability, making it ideal for various living spaces, including those with only shower stalls. Please read this manual thoroughly before assembly and use to ensure safe and optimal performance.
2. Important Safety Information
- Water Level: To prevent overload and potential bending of support tubes, fill the bathtub with only half of its capacity.
- Temperature: The tub can withstand extreme temperatures from -4°F (-20°C) to 158°F (70°C). Always test water temperature before entering.
- Stability: Ensure the bathtub is placed on a flat, stable surface. The six sturdy support pillars provide stability, but proper placement is crucial.
- Children: Children should always be supervised by an adult when using the bathtub.
- Drainage: Ensure the drain pipe is properly connected and directed to a suitable drain to prevent water damage.
- Assembly: Follow all assembly instructions carefully. Do not use the bathtub if any parts are damaged or missing.
3. Package Contents
Please verify that all components are present before beginning assembly:
- Bathtub Body (1)
- Support Frame (12 pieces)
- Connectors/Interfaces (6 pieces)
- Manual Air Pump (1)
- Drain Pipe (1)
- Portable Storage Bag (1)
- Water-filled Cushion (1)
- Backrest (1)
- Bath Bags (10 pieces)

4. Setup and Assembly
Follow these steps to assemble your portable bathtub. For a visual guide, please refer to the assembly video below.
- Connect the Frame: Assemble the white support frame pieces using the green connectors to form a rectangular base. Ensure all connections are secure.
- Prepare Bathtub Body: Lay the bathtub body flat. Insert the straight support tubes into the designated pockets along the sides of the bathtub body.
- Assemble Bracket: Connect the assembled rectangular frame to the six vertical support tubes.
- Secure Buttons: Fasten the buttons on the bathtub fabric to the frame to hold it in place.
- Install Drain: Plug in the two drain stoppers at the bottom of the tub. Connect the flexible drain hose to the lower drain outlet.
- Final Check: Ensure all components are securely in place and the bathtub is stable before filling with water.

5. Operation
5.1 Filling the Bathtub
Place the bathtub in your desired location, ensuring the drain hose is positioned correctly. Begin filling the tub with water. Remember the safety guideline: fill the bathtub with only half of the water to avoid overloading and potential bending of the support tubes.
5.2 Draining the Bathtub
The bathtub features a double drain hole design for efficient water removal. The included drain pipe can be stretched up to 20 inches (50 cm) in length. Ensure the drain pipe is directed towards a floor drain or other suitable drainage area. Once the water level drops below the upper drain, you may need to slightly tilt the tub or use the lower drain for complete emptying.

5.3 Hot Soaking and Ice Bath Therapy
The 6-layer insulation material, including enhanced canvas cloth and thickened PVC pipes, helps retain water temperature. It can maintain up to 85% of its temperature for up to three hours, making it suitable for both hot soaks and ice baths. The durable material is designed to withstand extreme conditions.

6. Maintenance and Cleaning
To ensure the longevity and hygiene of your portable bathtub, follow these maintenance guidelines:
- After Each Use: Drain all water completely. Rinse the interior with clean water.
- Cleaning: Use a mild soap or non-abrasive cleaner with a soft cloth or sponge to clean the interior and exterior surfaces. Avoid harsh chemicals that could damage the material.
- Drying: Allow the bathtub to air dry thoroughly before folding and storing to prevent mold or mildew growth.
7. Storage
The Onebook Portable Foldable Bathtub is designed for easy storage. Follow these simple steps to fold it:
- Fold in Direction of Arrow: Gently fold the bathtub in the direction indicated by the arrows on the fabric.
- Fold Both Sides: Fold both sides of the tub inwards, following the arrow direction.
- Fold the Back: Finally, fold the back section of the tub.
Once folded, place it in the provided portable storage bag. This compact design allows for convenient storage without taking up excessive space.

8. Troubleshooting
- Leaking: Ensure all drain stoppers are securely in place and the drain hose is properly connected. Check the bathtub body for any visible damage or punctures.
- Instability: Verify that the bathtub is placed on a flat, level surface. Confirm that all support frame pieces are correctly assembled and inserted into their designated pockets.
- Water Drains Slowly: Check for any blockages in the drain stoppers or the drain hose. Ensure the drain hose is not kinked.
- Difficulty Folding: Ensure all water is drained and the tub is dry. Follow the folding steps precisely, applying gentle pressure.
9. Specifications
| Feature | Specification |
|---|---|
| Model Number | ZH2643 |
| Product Dimensions (L x W x H) | 47.27" x 23.62" x 19.68" (120cm x 60cm x 50cm) |
| Material | Canvas (6-layer insulation) |
| Color | Starry Blue |
| Capacity | Approx. 40 Gallons (150 Liters) - 300 Liters total volume |
| Item Weight | 8.33 pounds (3.78 kg) |
| Installation Type | Freestanding |
| Temperature Resistance | -4°F (-20°C) to 158°F (70°C) |

10. Warranty and Support
Onebook is committed to providing high-quality products. For any questions, concerns, or support needs regarding your Portable Foldable Bathtub (Model ZH2643), please contact our customer service team. We are happy to assist you with any issues you may encounter during your purchase or use of the product.
Please refer to your purchase documentation for specific warranty details and contact information.