Some of the "compatible" replacement tips have received feedback that they do not fit, are difficult to detach and/or are difficult to rotate in the WaterPik. In my case at least, they come in and out easily, stay in place during use, and seem to do the same job as name brand parts.
๐ฆท Ultra Waterpik WP-112 Water Flosser for Superior Oral Health
83 Review
Oral-B Professional Care OxyJet MD20 Irrigation, white/blue
64 Review
Waterpik Nano Plus WP-320: Your Compact Companion for Healthy Teeth and Gums Anywhere!
104 Review
Enhanced Dental Care: Philips ๐ฆท Sonicare Airfloss Ultra, HX8432/13, Black Edition
40 Review
Breath Me TM 50pcs Black Fiber Reed Diffuser Refill Sticks 12 inch - Elegant Home Fragrance Replacement
11 Review
๐ฆท Colgate Max Fresh Whitening Toothpaste with Breath Strips, Clean Mint, Limited Edition - 6 Oz, 24 Ounce (Pack of 4)
10 Review
The Legend of Zelda: Breath of the Wild game for Nintendo Switch, cartridge
20 Review
๐ TheraBreath Fresh Breath Chewing Gum: ZINC with Citrus Mint Flavor - Pack of 6 (10 Count)
11 Review