Black Rubber Valve Of Tabletop Plus Water Flosser Oc300 Product Description: The water tank rubber valve of your OC300 Tabletop PLUS® Water Flosser® is used to avoid water leakage from your tank. This rubber valve is situated at the bottom of the water tank and is replaceable in case of any damage. The rubber valve is available in a classic black color. Enjoy hassle-free and seamless flossing with you and your family with our OC300 Water Flosser® model. Compatibility: The Water Tank Rubber Valve of Tabletop Water Flosser® is compatible with: OC300 Tabletop PLUS® Water Flosser®