This handheld model has limited functionality. The water chamber is too small to be useful. It only holds enough water to clean one quarter of your mouth per filling. Water goes all over the place when using it. I bought a plug in model to use instead. I don’t recommend any handheld version.
No, I would not recommend this to a friend.
Response from waterpik.comBy Waterpik Product Support, July 31, 2025
Hello NTVonline- We're sorry you were not satisfied with the WP-450. The unit is designed to be compact for those with limited counter space or who travel. Some users may find it necessary to refill the reservoir more than once. The model does have a 30-day money-back guarantee. For more information, please contact us at 1-800-525-2774 or email smreviews@waterpik.com.
I have been using Waterpik WP-450 every night since a month ago. I just followed the instructions to use on the website. flossing with luke-warm water is very relaxing and much more convenient than thread floss.
This model would be good for traveling as it is not heavy or large and has a small attached water reservoir. I was looking for something that does not need to be filled up with water so quickly.
Item is okay, but the tips to use are extremely expensive and Not available is stores. The surcharge for ordering is extremely high, therefore I must do without.
It doesn't work you hear the motor but no water comes out
Response from waterpik.comBy Waterpik Product Support, August 20, 2025
Hello Mary23- We're sorry for the issue you encountered. Please note that new units require priming before their initial use. For detailed instructions, you can refer to our Quick Start Guide here: https://www.waterpik.com/pdfs/WP-450-quick-start-guide-usb.pdf. If you still need assistance, please give us a call at 1-800-525-2774