I bought fence finials but the 1/2 inch pvc pipe was too big to go into them. I found some cpvc pipe that fits into them but there is a lot of room to spare. I am looking for suggestions as to how to glue the finial onto the small cpvc pipe. I have thought about putting duct tape around the pipe to take up some of the room and then gluing them but does anyone have a better idea? I am afraid over time the tape would stop holding onto the pipe in our AZ heat.