Okay, this is great for a 4" sewer pipe. On the 3" pipe I didn't use the soft black rubber ring, I wrapped a piece of soft foam rubber around it with some gray hard plastic and slid it into the 3" drain hole. Unless you want to improvise, I would suggest ordering one that has both a 3" and 4" collar. One way to improve this would be to add one 45Β° M/F adapter to allow the hose to lay flat on the ground.
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