Introduction
Thank you for choosing the Mornwell Water Flosser. This device is designed to provide effective oral hygiene by using a powerful water jet to clean between teeth and below the gumline, where traditional brushing and flossing may not reach. Please read this manual thoroughly before first use to ensure safe and optimal operation.

This image displays the complete Mornwell Water Flosser package, including the main unit, various nozzle tips, and the USB charging cable. The device is white with a clear water tank, and the packaging highlights key features like "Rechargeable Oral Irrigator" and "12 Months Warranty".
Safety Information
Please read and understand all safety warnings and instructions before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always read the instructions before use.
- Do not use if you have medical conditions, including but not limited to, epilepsy, heart conditions, or are pregnant. Consult your doctor if unsure.
- Keep out of reach of children. This device is not a toy.
- Do not immerse the device in water. The device is IPX7 waterproof, but the charging port should be kept dry.
- Always disconnect the device from the power source before cleaning.
- Allow the device to cool down before storing.
- Do not use damaged or broken parts. Contact customer support for replacements.
- Always follow the manufacturer's instructions for use, handling, and maintenance.
Product Components
Familiarize yourself with the main parts of your Mornwell Water Flosser:
- Main Unit: Contains the motor, battery, and control buttons.
- Water Tank: Detachable reservoir for water.
- Nozzle Tips: Various tips for different cleaning needs (e.g., standard, periodontal, orthodontic).
- USB Charging Cable: For recharging the internal battery.

This image illustrates the dimensions of the water flosser, showing its height (approximately 23 cm or 9.05 inches) and width (approximately 6 cm or 2.36 inches). It also highlights key features such as the 300ML large capacity water tank, powerful battery life, and its portable and lightweight design.
Setup and First Use
- Charge the Device: Before first use, fully charge the water flosser. Connect the USB charging cable to the device and a suitable USB power adapter (not included). The indicator light will show charging status. A full charge takes approximately 8 hours and provides up to 2 weeks of use.
- Attach Nozzle Tip: Insert the desired nozzle tip into the hole at the top of the main unit until it clicks into place.
- Fill Water Tank: Detach the water tank by sliding it down. Fill the 300ml tank with lukewarm water. You can also add mouthwash if desired. Reattach the tank securely.
- Prime the Unit (First Use Only): Point the nozzle into a sink. Turn on the device to allow water to flow through until a steady stream is produced. This removes any air from the system.

This image demonstrates the detachable design of the water flosser, highlighting its ease of use and portability. It shows how the water tank can be separated from the main unit for convenient filling and cleaning, emphasizing its large capacity and simple water addition process.
Operating Instructions
The Mornwell Water Flosser features 3 cleaning modes to suit various oral care needs:
- Normal Mode (60-90 PSI): For daily cleaning and experienced users. Provides a strong water pulse for effective plaque removal.
- Soft Mode (40-60 PSI): Ideal for first-time users, sensitive teeth, and delicate gums. Offers a gentle yet effective cleaning.
- Pulse Mode (40-80 PSI): Designed to massage gums and stimulate blood circulation, promoting stronger gums.

This image provides a close-up of the Mornwell Water Flosser's control panel, clearly labeling the "ON/OFF BUTTON" and "ADJUST MODE BUTTON". It details the three cleaning modes: Normal (60-90 PSI for experienced users), Soft (40-60 PSI for sensitive teeth), and Pulse (40-80 PSI for gum massage), along with their respective indicator lights.
How to Use:
- Select your desired cleaning mode by pressing the "Mode" button.
- Lean over a sink and place the nozzle tip into your mouth, aiming it at your gumline at a 90-degree angle.
- Press the "On/Off" button to start the water flow.
- Guide the water stream along your gumline, pausing briefly between teeth. Allow the water to flow into the sink.
- The device features a 2-minute auto-timer to ensure optimal cleaning time and prevent over-exposure. It will automatically shut off after 120 seconds.
- After use, turn off the device and empty any remaining water from the tank.

This image shows a couple using the Mornwell Water Flosser in a bathroom setting, illustrating its application for deep cleaning teeth. It conveys the product's ease of use in a daily oral hygiene routine.
Maintenance and Cleaning
Regular cleaning and maintenance will ensure the longevity and optimal performance of your Mornwell Water Flosser.
- After Each Use: Empty any remaining water from the tank. Rinse the water tank thoroughly with clean water.
- Cleaning the Main Unit: Wipe the exterior of the main unit with a soft, damp cloth. Do not use abrasive cleaners or immerse the unit in water.
- Cleaning Nozzle Tips: Remove the nozzle tip and rinse it under running water. For deeper cleaning, you can soak the tips in a solution of 2 parts water to 1 part white vinegar for 5-10 minutes, then rinse thoroughly. Replace nozzle tips every 3-6 months, or sooner if they become worn.
- Drying and Storage: Allow all parts to air dry completely before reassembling and storing. Store the device in a cool, dry place away from direct sunlight.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery or not charged. | Charge the device fully (approx. 8 hours). |
| Weak water pressure. | Water tank empty or low. Nozzle tip clogged. Air in the system. | Refill water tank. Clean nozzle tip. Prime the unit by running it into a sink until steady flow. |
| Water leaks from the unit. | Water tank not securely attached. Nozzle tip not fully inserted. | Ensure water tank is clicked into place. Ensure nozzle tip is fully inserted until it clicks. |
| Device stops unexpectedly. | 2-minute auto-timer activated. Low battery. | This is normal operation for the auto-timer. Recharge the device if battery is low. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | D52 |
| Model Number | D52 300ML Oral Irrigator Mundduschen |
| Dimensions (L x W x H) | 30.8 x 6 x 8.8 cm (12.1 x 2.4 x 3.5 inches) |
| Weight | 490 g |
| Water Tank Capacity | 300 ml |
| Cleaning Modes | Normal, Soft, Pulse |
| Water Pressure Range | 40-90 PSI (depending on mode) |
| Water Pulse Frequency | 1400 times per minute |
| Battery Type | Lithium-polymer (1 required) |
| Charging Time | Approx. 8 hours |
| Battery Life | Up to 2 weeks of use |
| Waterproof Rating | IPX7 |
| Power Source | Corded Electric (USB-rechargeable) |
| Manufacturer | Prooral Health Technology (Shenzhen) Ltd |
| ASIN | B07DFDXYQS |

This image visually compares the 300ml water tank of the Mornwell Water Flosser to two smaller 150ml tanks, illustrating its larger capacity. Dimensions of the 300ml tank are provided (20 cm / 7.9 in height, 8.8 cm / 3.5 in width), emphasizing its advantage for extended use without refilling.
Warranty and Support
Your Mornwell Water Flosser is covered by a limited 12-month warranty from the date of purchase. This warranty covers manufacturing defects and ensures replacement or refund for qualifying issues.
For warranty claims, technical support, or any questions regarding your product, please contact Mornwell customer service. Refer to your purchase documentation for specific contact details or visit the official Mornwell website.
Manufacturer: Prooral Health Technology (Shenzhen) Ltd
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