AC drain lines must not connect directly to the DWV.

AC drain lines must not connect directly to the DWV.

• A. Not specified
• B. False
• C. True
• D. Only with permit

Answer: (C)

AC condensate drainage must be protected from backflow and sewer gases. Connecting the condensate line directly to the DWV could allow wastewater or sewer gas to back up into the air conditioner or into the space, especially if a backflow or sewer problem occurs. To prevent this, the condensate line is routed indirectly into the drainage system—often through an air gap into an approved receptor (like a floor drain or dedicated condensate drain) or via a trap/vent arrangement required by code. This is why the statement is true: AC drain lines should not connect directly to the DWV.

AC condensate drainage must be protected from backflow and sewer gases. Connecting the condensate line directly to the DWV could allow wastewater or sewer gas to back up into the air conditioner or into the space, especially if a backflow or sewer problem occurs. To prevent this, the condensate line is routed indirectly into the drainage system—often through an air gap into an approved receptor (like a floor drain or dedicated condensate drain) or via a trap/vent arrangement required by code. This is why the statement is true: AC drain lines should not connect directly to the DWV.