I tried to hook one on ours but couldn't access the outlet short of removing the unit. What I have done is hook a close pin or similar to the rain gutter and use it as a drip line. If you don't have gutter might be able to lay a rope on roof and redirect water off the edge at a better location. This usually works until the wind sends the water in a new direction. Some of the new MHs have a built in drain so there is always that option...tim