3717-1-05.1(J) Critical Observed unapproved backflow prevention device on the plumbing system. To prevent contamination, a plumbing system shall be installed to preclude backflow of a solid, liquid, or gas contaminant into the water supply system at each point of use at the FSO or RFE, including on a hose bibb if a hose is attached or on a hose bibb if a hose is not attached and backflow prevention is required by the Ohio building code by installing an approved backflow prevention device as specified under paragraph (E) of this rule.
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