807.2 Undiluted Condensate Waste.

Where undiluted condensate waste from a fuel-burning condensing appliance is discharged into the drainage system, the material in the drainage system shall be cast-iron, galvanized iron, plastic, or other materials approved for this use.

Exceptions: (1) Where the above condensate is discharged to an exposed

fixture tailpiece and trap, such tailpiece and trap shall be permitted to be a copper alloy. (2) Materials approved in Section 701.0 shall be permitted to

be used where data is provided that the condensate waste is adequately diluted.