Berkey

1 product scored · average composite 3.2/10. Scores are computed from published specs and verified certifications, not brand reputation.

• 3.2
  Big Berkey Gravity System

  Genuinely cheap per gallon, but 'tested to' lab claims; we found no NSF/ANSI certification listing as of 2026-06-05. In our view, the widest claim-vs-proof gap in the set.

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