Replacement Parts for Waterflosser Oral Irrigator Dental Compatible with Waterpik Sonic Fusion Portable Water Flosser SF-02W SF-02 Reservoir Gasket Valve Compatible with Waterpik SF-02W SF-02 SF02 Reservoir Gasket Valve. Keep your Waterflosser with factory pressure. Don't let the water stain and residue reduce factory setting pressure. Replace Reservoir/ Tank every 3 months for hygienic recommendation and efficiency. Replacement for Waterpik Sonic Fusion Portable Water Flosser SF-01W SF-01 SF01 series only. 15 oz reservoir with 60+ seconds flossing time with one fill.