Quick take
Use Frigidaire FPPWFU01 / PurePour PWF-1 or a compatible cartridge explicitly listed for that part number and refrigerator model.
Correct filter mapping
Frigidaire’s owner-support page for GRFS2853AF lists FPPWFU01 PurePour PWF-1 as the replacement water and ice filter.
OEM vs compatible
OEM FPPWFU01 is the simplest fit. Compatible cartridges can be cheaper if they clearly document PWF-1 compatibility and their certification.
Recurring cost
Frigidaire recommends periodic replacement, making this a recurring purchase rather than a one-time accessory.
Where to compare
Replacement-filter specialists can provide multiple compatible price points for PWF-1 owners.