Ok got a problem here. Finally got the new pump and the thread is 2 inch not 2 1/2 like my old one. No problem I'll just take off the faceplate of my old pump which still looks good and put it on the new pump. As much as I try I cannot get it to snap in place. Now here is the weird part. Both faceplates fit on my old pump. So has anyone had success in changing the faceplate on a 56 series waterway pump from a 2 inch to a 2 1/2? If they both fit on my old waterway why would they both not fit on my new one? One thing I noticed is my new pump is model pf-40-2n22m but my old one is pf-40-2n22c. According to the internet they should be the same pump? Thanks for any help. Sheldon