Note: Slide the button switch handle, the water flow will work normally only if the switch is moved to the "ON" position. Easy to Use: Easy to install and remove, simple to operate and durable. Portable and lightweight, very easy to carry and put away. Replace: Provides an alternative to replace an old or broken water flosser handle/hose so your water flosser continues to look its best. Compatible Models: WP-100EC, WP-100W, WP-100C, WP-112, WP-120, WP-130, WP-140, WP-150, WP-250EC, WP-305, WP-310, WP-660, WP-662, WP-663, WP-664, WP-670, WP-672, WP-861, WP-862, WP-900, WP-950 etc. Compatibility: High Quality Replacement Hose Plastic Handle Assembly Kit Compatible with Waterpik Oral Irrigator.