This is a compilation of replacement tips for the popular waterpik water flossers. In this post, we are covering the cordless models – WP-360, WP-440, WP-450, WP-480. These tips are supposed to be changed once in 3 to 6 months. The replacement tips from the OEM are usually sold in packs of 2. There is scope for saving a few bucks in getting the larger 6 packs such as those sold by GFP.