Product Overview
The Waterpik Cordless Plus Water Flosser is designed for convenient and effective oral hygiene, offering a portable solution for both home and travel use. It utilizes a unique combination of water pressure and pulsations to clean deep between teeth and below the gumline, areas often missed by traditional brushing and flossing. This rechargeable device is clinically proven to remove plaque and improve gum health.

Image: Waterpik Cordless Plus Water Flosser, a white, sleek, handheld device with a water reservoir and a flossing tip.
Key Features
- Rechargeable Cordless Design: Ideal for use at home or while traveling, offering flexibility without the need for constant power connection.
- Multiple Flossing Tips: Includes 4 specialized tips for various dental needs, ensuring comprehensive cleaning.
- Ergonomic Hand Grip: Designed for comfortable and easy handling, allowing for precise flossing even in hard-to-reach areas.
- Quiet Water Flossing Technology: Operates with reduced noise for a more pleasant user experience.
- ADA Accepted: Recognized by the American Dental Association for safety and effectiveness.
- Dual Pressure Settings: Offers two safe and effective pressure settings to personalize water flosser intensity.
- Removable Reservoir: A 7oz reservoir provides up to 45 seconds of flossing time and is top-rack dishwasher safe for easy cleaning.
- 360-Degree Tip Rotation: Allows for easy access to all areas of the mouth, including back teeth.
- PrecisionPulse Technology: Delivers a combination of water pressure and pulsations to remove up to 99.9% of plaque bacteria.

Image: Diagram highlighting key features and dimensions of the Waterpik Cordless Plus, including improved tip rotation, ultra-quiet technology, easy-slide power and pressure switches, narrow grip, easy-to-fill reservoir, higher capacity batteries, and rechargeable capability. Dimensions are shown as Height 11.6 inches (29.5 cm), Width 3 inches (7.62 cm), Depth 4 inches (10.16 cm).
Setup
- Charge the Device: Before first use, fully charge the Water Flosser. The charging port is located at the bottom of the unit.
- Fill the Reservoir: Open the reservoir cap and fill with warm water. The reservoir has a 7oz capacity.
- Attach the Tip: Insert the desired flossing tip into the handle until it clicks into place.

Image: A hand filling the Waterpik Cordless Plus reservoir under a faucet, illustrating the easy-to-fill design and its 45+ seconds of water capacity.

Image: Contents of the Waterpik Cordless Plus box, showing the main unit, USB charger, and four different flossing tips.
Operating Instructions
- Select Pressure Setting: Choose your desired water pressure intensity using the control switch on the handle (High or Low).
- Position the Tip: Lean over a sink and place the tip in your mouth, aiming it at the gumline.
- Turn On Device: Slide the On/Off switch to the "On" position.
- Floss: Guide the tip along your gumline and between your teeth, pausing briefly at each tooth. Allow the water to flow into the sink.
- Turn Off Device: When finished, slide the On/Off switch to the "Off" position.

Image: Close-up of the Waterpik Cordless Plus showing the two pressure settings (1 and 2) for personalized water flosser intensity.

Image: A hand operating the On/Off water control switch located conveniently on the handle of the Waterpik Cordless Plus, allowing for easy start and stop of water flow.

Image: A close-up of the Waterpik Cordless Plus tip, demonstrating its ability to rotate 360 degrees to reach all areas of the mouth.
Maintenance
- Empty and Clean Reservoir: After each use, empty any remaining water from the reservoir. The reservoir is top-rack dishwasher safe for thorough cleaning.
- Clean the Unit: Wipe the exterior of the unit with a soft cloth. Do not immerse the main unit in water.
- Tip Replacement: Replace flossing tips every 3 months or as recommended by your dental professional.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Weak Water Stream | Low battery charge; mineral deposits in unit. | Ensure unit is fully charged. Perform a descaling procedure using white vinegar and water. |
| Unit Not Turning On | Battery depleted; unit not properly assembled. | Charge the unit. Ensure the reservoir and tip are securely attached. |
| Water Leaking | Reservoir not sealed properly; tip not inserted correctly. | Ensure the reservoir cap is tightly closed and the tip is fully seated. |
Specifications
- Model Number:
- WP 450 / 20009320
- Dimensions:
- 5 x 3.19 x 9 inches
- Weight:
- 1.41 Pounds
- Power Source:
- Battery Powered (NiMH battery)
- Reservoir Capacity:
- 7 oz (up to 45 seconds flossing time)
- Pressure Settings:
- 2 (High, Low)
Warranty & Support
The Waterpik Cordless Plus Water Flosser is backed by a two-year warranty.
For detailed warranty information, please refer to the official Warranty document:
For additional support, product information, or to purchase replacement parts and accessories, please visit the official Waterpik Store:







