1. Introduction
Thank you for choosing the WATERPULSE V400PLUS Water Flosser. This manual provides essential information for the safe and effective use of your device. Please read it thoroughly before operation and retain it for future reference.
Product Overview
The WATERPULSE V400PLUS is a compact and portable oral irrigator designed to remove plaque and food debris from between teeth and below the gumline, promoting healthier gums and fresher breath. It features multiple pressure settings and a convenient design for daily use.

Image 1.1: The WATERPULSE V400PLUS Water Flosser, showcasing its main components including the handle, reservoir, and interchangeable tip.
2. Important Safety Information
Always follow basic safety precautions when using electrical products, especially when children are present. Read all instructions before use.
DANGER - To reduce the risk of electrocution:
- Do not handle the charger with wet hands.
- Do not place or store the product where it can fall or be pulled into a tub or sink.
- Do not place in or drop into water or other liquid.
- Do not reach for a product that has fallen into water. Unplug immediately.
WARNING - To reduce the risk of burns, electrocution, fire, or injury to persons:
- Close supervision is necessary when this product is used by, on, or near children or invalids.
- Use this product only for its intended use as described in this manual.
- Do not use attachments not recommended by the manufacturer.
- Never operate this product if it has a damaged cord or plug, if it is not working properly, if it has been dropped or damaged, or dropped into water.
- Keep the cord away from heated surfaces.
- Never use while sleeping or drowsy.
- Do not use outdoors or operate where aerosol (spray) products are being used or where oxygen is being administered.
- Do not direct water under the tongue, into the ear, nose, or other delicate areas. This product is capable of producing pressures that may cause serious damage in these areas.
- Fill reservoir with water or other dental professional recommended solutions only.
3. Setup and Initial Use
3.1 Unpacking
Carefully remove all components from the packaging. Ensure all parts listed below are present:
- WATERPULSE V400PLUS Main Unit
- Standard Jet Tip
- Tongue Cleaner Tip
- Orthodontic Tip
- Nasal Tip
- Charger
- User Manual
3.2 Charging the Unit
- Plug the charger into a standard electrical outlet.
- Connect the charging cable to the charging port on the unit.
- Allow the unit to charge for approximately 4 hours for a full charge before first use. The charging indicator light will illuminate during charging and turn off or change color when fully charged.

Image 3.1: Connecting the WATERPULSE V400PLUS to its charger for initial charging.
3.3 Attaching a Tip
- Select the desired tip.
- Insert the tip into the hole in the center of the handle until it clicks into place.
- To remove the tip, press the tip eject button on the side of the handle and pull the tip out.

Image 3.2: Illustration of inserting and removing an interchangeable tip from the flosser handle.
3.4 Filling the Reservoir
- Open the reservoir cap.
- Fill the reservoir with lukewarm water. You may also use mouthwash or other dental solutions as recommended by your dentist.
- Close the reservoir cap securely.
4. Operating Instructions
4.1 First-Time Use (Priming the Unit)
For first-time use, or if the unit has not been used for a long period, it may need to be primed:
- Fill the reservoir with water.
- Point the tip into a sink.
- Turn the unit ON.
- Set the pressure control to the highest setting.
- Allow water to flow until a steady stream is produced.
4.2 Daily Use
- Fill the reservoir with lukewarm water.
- Insert the desired tip into the handle.
- Select your desired pressure setting. Start with the lowest setting and gradually increase as you become accustomed to the flosser.
- Lean over a sink and place the tip in your mouth. Close your lips enough to prevent splashing, but allow water to flow from your mouth into the sink.
- Turn the unit ON.
- Direct the water stream at a 90-degree angle to your gumline. Move the tip along the gumline, pausing briefly between teeth.
- Continue until you have cleaned all areas of your mouth.
- Turn the unit OFF when finished.
- Empty any remaining water from the reservoir.

Image 4.1: Demonstrating the correct technique for using the WATERPULSE V400PLUS, with the user leaning over a sink.
4.3 Pressure Settings
The WATERPULSE V400PLUS offers multiple pressure settings to suit individual needs. Use the pressure control dial or button on the unit to adjust the intensity of the water stream.
- Low Setting: Gentle pressure, ideal for sensitive gums or first-time users.
- Medium Setting: Standard pressure for effective daily cleaning.
- High Setting: Maximum pressure for deep cleaning and stubborn debris.
5. Maintenance and Cleaning
Regular cleaning ensures optimal performance and extends the life of your WATERPULSE V400PLUS.
5.1 Cleaning the Unit
- Before cleaning, ensure the unit is turned OFF and unplugged from the charger.
- Wipe the exterior of the unit with a soft, damp cloth. Do not immerse the unit in water.
- For stubborn stains, use a mild soap solution.
5.2 Cleaning the Reservoir
- Remove the reservoir from the unit.
- Wash the reservoir with warm, soapy water. Rinse thoroughly.
- For deeper cleaning, you can run a solution of 2 tablespoons of white vinegar mixed with 16 ounces of warm water through the unit.
5.3 Cleaning the Tips
- Remove the tip from the handle.
- Rinse the tip under warm running water.
- For thorough cleaning, soak tips in a container of hydrogen peroxide or white vinegar for 5-10 minutes. Rinse well afterwards.
- Replace tips every 3-6 months, or sooner if they become worn.

Image 5.1: Steps for cleaning the detachable reservoir and various tips of the water flosser.
6. Troubleshooting
If you experience issues with your WATERPULSE V400PLUS, refer to the following table for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn ON. | Battery is low or dead. | Charge the unit for at least 4 hours. |
| No water flow or weak flow. | Reservoir is empty. Tip is clogged. Unit needs priming. | Fill reservoir. Remove and clean tip. Refer to "First-Time Use (Priming the Unit)" section. |
| Water leaks from unit. | Reservoir cap not closed properly. Tip not inserted correctly. | Ensure reservoir cap is securely closed. Re-insert tip until it clicks into place. |
| Unit stops working during use. | Battery is low. Overheating protection activated. | Recharge the unit. Turn off the unit and let it cool down for 30 minutes before resuming use. |
7. Specifications
| Feature | Detail |
|---|---|
| Model | V400PLUS |
| Power Source | Rechargeable Battery |
| Water Pressure Range | Adjustable (e.g., 30-100 PSI) |
| Reservoir Capacity | Approx. 200ml |
| Charging Time | Approx. 4 hours |
| Operating Time | Approx. 2 weeks on a full charge (based on 1 minute use per day) |
8. Warranty and Support
8.1 Limited Warranty
The WATERPULSE V400PLUS Water Flosser comes with a limited warranty against defects in materials and workmanship for a period of 1 year from the date of purchase. This warranty does not cover damage caused by misuse, abuse, alteration, or unauthorized repair. Please retain your proof of purchase for warranty claims.
8.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact our customer support team:
- Website: www.waterpulse.com
- Email: support@waterpulse.com
- Phone: Please refer to the contact information provided on the product packaging or official website for your region.





