What is the capacity of the BURST Water Flosser water tank? 21 October 2021 20:16 Updated 110ml or about 22 seconds of use on Standard mode. Related articles Can I use Peroxide in my BURST Water Flosser? Can I use Mouthwash in my BURST Water Flosser? What is the water pressure of the BURST Water Flosser? Can I use my BURST Water Flosser daily? How do I use the BURST Water Flosser?