Sun2Solar 1&frac12;" Backwash Hoses This backwash hose is made of tough vinyl material and is UV protected. Use a hose clamp (not included) to connect this flexible and durable backwash discharge hose to your pool filter for draining. NOTE: As many areas require backwash water to be run to the sewer system or curb, make sure to get a hose long enough to reach. 1 1/2" Diameter 200' Length