This pool backwash hose is flexible and durable! Use a hose clamp (not included) to connect the backwash discharge hose to your pool filter for draining. Tough vinyl material & UV protected, this backwash hose is made to last. Backwash hose is 1 1/2 inches in diameter x 100 feet in length. Make sure to get a hose long enough to reach from your pools filter system to your sewer system, or curb.