This 48 ounce water store is a new part solely for the “World class” and “Great” Brewing Systems. (Brewer is excluded.) Compatible with Keurig B4x/K4x models. It would be ideal if you look underneath your brewer for the model number to guarantee compatibility.
Replacement Water Reservoir for Keurig B40, B41, B44, B45, B50, K40, K45, K50, Elite and Classic Brewing Systems – 48 oz (Black)