Fridge filter families
EveryDrop 1–8, GE MWF/XWF/RPWFE, Samsung shapes, and LG LT* housings are separate walls.
Housing walls
| Family | Current path | Hard stop |
| Whirlpool EveryDrop | EDR1…EDR8 | Filter numbers are not interchangeable |
| GE SmartWater twist | MWFP (legacy MWF) | ≠ XWF / RPWFE |
| GE XWF | XWF / XWFE | Different latch from MWF |
| Samsung round | DA29-00020B / HAF-CIN | ≠ square HAF-QIN |
| LG | LT1000P vs LT700P | Not drop-in across LT* |
Hard stop
Retail “compatible with” lists are noisy. The door label / old filter stamp wins.