3717-1-04(D) Equipment, utensils, and linens: materials for construction and repair

Copper - use limitation. Except for copper and copper alloys that may be used in contact with beer brewing ingredients that have a pH below six in the prefermentation and fermentation steps of a beer brewing operation such as a brewpub or microbrewery, copper and copper alloys such as brass is not to be used in contact with a food that has a pH below six such as vinegar, fruit juice, or wine or for a fitting or tubing installed between a backflow prevention device and a carbonator.