The rain drain in the picture above is simply that, a drain to help you remove water from your inflatables. Simply use waterproof glue and attach it on the bottom of your inflatable and cut a hole. The velcro flap prevents air from coming out. The drain is really easy to open, just use the one-finger pole.
Please Note: While our wet inflatables have a built-in rain drain, these rain drains can be used for older models that do not have one.