You can pick a couple different brands/types at Walmart, Home Depot, Lowes, any home improvement store. The only name I remember is Culligan, but anyone of them will work, it's just a standard filter, just depends if want to filter taste, sediment, or both.
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Danny & Linda
Full-timed 10+ years
Former '13 FB owner
Traded '13 GMC Denali DRW D/A
Currently rv & truckless
Replacement undetermined