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Dec 12, 2017 - 02:36 AM
According to 3M the B1 filter was replaced by C-CYST-FF, below is the link for the replacement cartridge.
https://www.rvupgradestore.com/A1-Rep...
https://www.rvupgradestore.com/A1-Rep...
Fresh Water > Water Filters & Cartridges
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Dec 12, 2017 - 02:36 AM
View all 3M B1 Under Sink Filtration Replacement Filter Questions & Answers
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