Milliard 50' Heavy Duty Backwash Hose, Great for Water Disposal - Weather and Chemical Resistant - 2" Diameter Dont let your pool pump create a marsh in your yard, use a backwash hose to drain water out to the street or sewer. 2in. diameter for standard filter coupling. Weather and chemical resistant to prevent leaks and tears from regular use. 50 backwash hose folds flat for easier storage when rolled up. Made from heavy duty vinyl to be flexible, durable, and long-lasting.