Filter RP100

Good Morning

I purchased a Clean and Clear RP100(160354) last year.

The filter works great but I find that the cartridge has to be cleaned often. Looking at your site it looks like I can upgrade the size of the filter to a 150 or 200 without changing the main body. Just change the top housing, cartridge and cartridge housing. Is this possible? And if so what are the exact parts I would need and available? Thank you very much for your help.

No, you will need to change the entire filter.  It is not possible to change out parts of the filter to make it bigger.