Hello, I’m hoping someone can help me identify my sand filter. I need to replace the lateral assembly. Unfortunately the sticker with the details has fallen off. I bought the pool used and it came with a bunch of paperwork that I’m not sure even goes with my pool.. The only documentation I could find for the filter specifies that it’s either sand dollar, SD35, SD40 or SD50 but it seems to be a 22” tank, which would be the SD60. I have searched on line and can not find any info on the SD50. Does anyone have any ideas? Thank you!