The bushings that come with the chlorinator (2" to 1 1/2" adaptors) are supposed to be glued inside of the chlorinator base (2" pipe). I tried them on and they are very tight. I'm wondering if they are supposed to go all the way in until the stop in the middle of the pipe or not? i don't want to bang them in when i glue them, but i also want to be sure that they are as far inside as they are supposed to go.