Every HydroFloss comes with a 1 year warranty. You can find this warranty information on a blue card that comes with every new HydroFloss oral irrigator. It's in the box, located with the directions for use.
This warranty automatically covers all brand new HydroFloss oral irrigator units for 1 year from the date of purchase - according to the terms of the warranty which you will find clearly stated on the blue warranty card.
On the same blue card is an offer to extend the warranty to a period of three years. This is optional and does involve a fee. But whether you purchase the extension or not, your 1 year warranty from the date of purchase of your Hydro Floss oral irrigator is still valid.
If your HydroFloss is older than 1 year and you have not purchased the extended warranty within 60 days of your original Hydro Floss Oral Irrigator purchase, you may want to consider purchasing a new HydroFloss Oral Irrigator.
The cost of ownership is minimal. For example, if you pay $98 for a new HydroFloss and it lasts 3 years before replacement, you have spent less than $33 per year.
If your HydroFloss Oral irrigator lasts 5 years before replacement, you have spent less than $20 per year on your HydroFloss. One HydroFloss can service an entire family, that makes the cost extremely minimal when you consider the benefit for each person.
Seems to me that the cost to help maintain good dental health is worth it. Nothing I have found works as good as the HydroFloss (when used correctly) to help keep the gums healthy. Since gum disease is the number one cause of tooth loss, this makes the HydroFloss Oral Irrigator an extremely valuable device, worth far more than $33 per year.